update the theme

1 files changed, 2314 insertions, 0 deletions

diff --git a/themes/blowfish/assets/lib/mermaid/layout-163b9689.js b/themes/blowfish/assets/lib/mermaid/layout-163b9689.js
new file mode 100644
index 0000000..5781ad2
--- /dev/null
+++ b/themes/blowfish/assets/lib/mermaid/layout-163b9689.js
@@ -0,0 +1,2314 @@
+import { a as isSymbol, b as baseFlatten, c as baseClone, d as baseIteratee, k as keys, e as baseFindIndex, g as baseEach, j as arrayMap, l as castFunction, m as baseForOwn, n as castPath, t as toKey, o as baseGet, p as hasIn, q as toString, f as forEach, G as Graph, h as has, i as isUndefined, r as filter, v as values, s as reduce } from "./graph-fe24fab6.js";
+import { a8 as isObject, a9 as setToString, aa as overRest, ab as root, ac as baseRest, ad as isIterateeCall, ae as keysIn, af as eq, ag as isArrayLike, ah as isArray, ai as baseFor, aj as baseAssignValue, ak as identity, al as isIndex, am as assignValue, an as baseUnary, ao as constant, ap as merge } from "./mermaid-dcacb631.js";
+var reWhitespace = /\s/;
+function trimmedEndIndex(string) {
+  var index = string.length;
+  while (index-- && reWhitespace.test(string.charAt(index))) {
+  }
+  return index;
+}
+var reTrimStart = /^\s+/;
+function baseTrim(string) {
+  return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, "") : string;
+}
+var NAN = 0 / 0;
+var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+var reIsBinary = /^0b[01]+$/i;
+var reIsOctal = /^0o[0-7]+$/i;
+var freeParseInt = parseInt;
+function toNumber(value) {
+  if (typeof value == "number") {
+    return value;
+  }
+  if (isSymbol(value)) {
+    return NAN;
+  }
+  if (isObject(value)) {
+    var other = typeof value.valueOf == "function" ? value.valueOf() : value;
+    value = isObject(other) ? other + "" : other;
+  }
+  if (typeof value != "string") {
+    return value === 0 ? value : +value;
+  }
+  value = baseTrim(value);
+  var isBinary = reIsBinary.test(value);
+  return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
+}
+var INFINITY = 1 / 0, MAX_INTEGER = 17976931348623157e292;
+function toFinite(value) {
+  if (!value) {
+    return value === 0 ? value : 0;
+  }
+  value = toNumber(value);
+  if (value === INFINITY || value === -INFINITY) {
+    var sign = value < 0 ? -1 : 1;
+    return sign * MAX_INTEGER;
+  }
+  return value === value ? value : 0;
+}
+function toInteger(value) {
+  var result = toFinite(value), remainder = result % 1;
+  return result === result ? remainder ? result - remainder : result : 0;
+}
+function flatten(array) {
+  var length = array == null ? 0 : array.length;
+  return length ? baseFlatten(array, 1) : [];
+}
+function flatRest(func) {
+  return setToString(overRest(func, void 0, flatten), func + "");
+}
+var CLONE_DEEP_FLAG = 1, CLONE_SYMBOLS_FLAG = 4;
+function cloneDeep(value) {
+  return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
+}
+var now = function() {
+  return root.Date.now();
+};
+const now$1 = now;
+var objectProto = Object.prototype;
+var hasOwnProperty = objectProto.hasOwnProperty;
+var defaults = baseRest(function(object, sources) {
+  object = Object(object);
+  var index = -1;
+  var length = sources.length;
+  var guard = length > 2 ? sources[2] : void 0;
+  if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+    length = 1;
+  }
+  while (++index < length) {
+    var source = sources[index];
+    var props = keysIn(source);
+    var propsIndex = -1;
+    var propsLength = props.length;
+    while (++propsIndex < propsLength) {
+      var key = props[propsIndex];
+      var value = object[key];
+      if (value === void 0 || eq(value, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+        object[key] = source[key];
+      }
+    }
+  }
+  return object;
+});
+const defaults$1 = defaults;
+function last(array) {
+  var length = array == null ? 0 : array.length;
+  return length ? array[length - 1] : void 0;
+}
+function createFind(findIndexFunc) {
+  return function(collection, predicate, fromIndex) {
+    var iterable = Object(collection);
+    if (!isArrayLike(collection)) {
+      var iteratee = baseIteratee(predicate);
+      collection = keys(collection);
+      predicate = function(key) {
+        return iteratee(iterable[key], key, iterable);
+      };
+    }
+    var index = findIndexFunc(collection, predicate, fromIndex);
+    return index > -1 ? iterable[iteratee ? collection[index] : index] : void 0;
+  };
+}
+var nativeMax$1 = Math.max;
+function findIndex(array, predicate, fromIndex) {
+  var length = array == null ? 0 : array.length;
+  if (!length) {
+    return -1;
+  }
+  var index = fromIndex == null ? 0 : toInteger(fromIndex);
+  if (index < 0) {
+    index = nativeMax$1(length + index, 0);
+  }
+  return baseFindIndex(array, baseIteratee(predicate), index);
+}
+var find = createFind(findIndex);
+const find$1 = find;
+function baseMap(collection, iteratee) {
+  var index = -1, result = isArrayLike(collection) ? Array(collection.length) : [];
+  baseEach(collection, function(value, key, collection2) {
+    result[++index] = iteratee(value, key, collection2);
+  });
+  return result;
+}
+function map(collection, iteratee) {
+  var func = isArray(collection) ? arrayMap : baseMap;
+  return func(collection, baseIteratee(iteratee));
+}
+function forIn(object, iteratee) {
+  return object == null ? object : baseFor(object, castFunction(iteratee), keysIn);
+}
+function forOwn(object, iteratee) {
+  return object && baseForOwn(object, castFunction(iteratee));
+}
+function baseGt(value, other) {
+  return value > other;
+}
+function baseLt(value, other) {
+  return value < other;
+}
+function mapValues(object, iteratee) {
+  var result = {};
+  iteratee = baseIteratee(iteratee);
+  baseForOwn(object, function(value, key, object2) {
+    baseAssignValue(result, key, iteratee(value, key, object2));
+  });
+  return result;
+}
+function baseExtremum(array, iteratee, comparator) {
+  var index = -1, length = array.length;
+  while (++index < length) {
+    var value = array[index], current = iteratee(value);
+    if (current != null && (computed === void 0 ? current === current && !isSymbol(current) : comparator(current, computed))) {
+      var computed = current, result = value;
+    }
+  }
+  return result;
+}
+function max(array) {
+  return array && array.length ? baseExtremum(array, identity, baseGt) : void 0;
+}
+function min(array) {
+  return array && array.length ? baseExtremum(array, identity, baseLt) : void 0;
+}
+function minBy(array, iteratee) {
+  return array && array.length ? baseExtremum(array, baseIteratee(iteratee), baseLt) : void 0;
+}
+function baseSet(object, path, value, customizer) {
+  if (!isObject(object)) {
+    return object;
+  }
+  path = castPath(path, object);
+  var index = -1, length = path.length, lastIndex = length - 1, nested = object;
+  while (nested != null && ++index < length) {
+    var key = toKey(path[index]), newValue = value;
+    if (key === "__proto__" || key === "constructor" || key === "prototype") {
+      return object;
+    }
+    if (index != lastIndex) {
+      var objValue = nested[key];
+      newValue = customizer ? customizer(objValue, key, nested) : void 0;
+      if (newValue === void 0) {
+        newValue = isObject(objValue) ? objValue : isIndex(path[index + 1]) ? [] : {};
+      }
+    }
+    assignValue(nested, key, newValue);
+    nested = nested[key];
+  }
+  return object;
+}
+function basePickBy(object, paths, predicate) {
+  var index = -1, length = paths.length, result = {};
+  while (++index < length) {
+    var path = paths[index], value = baseGet(object, path);
+    if (predicate(value, path)) {
+      baseSet(result, castPath(path, object), value);
+    }
+  }
+  return result;
+}
+function baseSortBy(array, comparer) {
+  var length = array.length;
+  array.sort(comparer);
+  while (length--) {
+    array[length] = array[length].value;
+  }
+  return array;
+}
+function compareAscending(value, other) {
+  if (value !== other) {
+    var valIsDefined = value !== void 0, valIsNull = value === null, valIsReflexive = value === value, valIsSymbol = isSymbol(value);
+    var othIsDefined = other !== void 0, othIsNull = other === null, othIsReflexive = other === other, othIsSymbol = isSymbol(other);
+    if (!othIsNull && !othIsSymbol && !valIsSymbol && value > other || valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol || valIsNull && othIsDefined && othIsReflexive || !valIsDefined && othIsReflexive || !valIsReflexive) {
+      return 1;
+    }
+    if (!valIsNull && !valIsSymbol && !othIsSymbol && value < other || othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol || othIsNull && valIsDefined && valIsReflexive || !othIsDefined && valIsReflexive || !othIsReflexive) {
+      return -1;
+    }
+  }
+  return 0;
+}
+function compareMultiple(object, other, orders) {
+  var index = -1, objCriteria = object.criteria, othCriteria = other.criteria, length = objCriteria.length, ordersLength = orders.length;
+  while (++index < length) {
+    var result = compareAscending(objCriteria[index], othCriteria[index]);
+    if (result) {
+      if (index >= ordersLength) {
+        return result;
+      }
+      var order2 = orders[index];
+      return result * (order2 == "desc" ? -1 : 1);
+    }
+  }
+  return object.index - other.index;
+}
+function baseOrderBy(collection, iteratees, orders) {
+  if (iteratees.length) {
+    iteratees = arrayMap(iteratees, function(iteratee) {
+      if (isArray(iteratee)) {
+        return function(value) {
+          return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee);
+        };
+      }
+      return iteratee;
+    });
+  } else {
+    iteratees = [identity];
+  }
+  var index = -1;
+  iteratees = arrayMap(iteratees, baseUnary(baseIteratee));
+  var result = baseMap(collection, function(value, key, collection2) {
+    var criteria = arrayMap(iteratees, function(iteratee) {
+      return iteratee(value);
+    });
+    return { "criteria": criteria, "index": ++index, "value": value };
+  });
+  return baseSortBy(result, function(object, other) {
+    return compareMultiple(object, other, orders);
+  });
+}
+function basePick(object, paths) {
+  return basePickBy(object, paths, function(value, path) {
+    return hasIn(object, path);
+  });
+}
+var pick = flatRest(function(object, paths) {
+  return object == null ? {} : basePick(object, paths);
+});
+const pick$1 = pick;
+var nativeCeil = Math.ceil, nativeMax = Math.max;
+function baseRange(start, end, step, fromRight) {
+  var index = -1, length = nativeMax(nativeCeil((end - start) / (step || 1)), 0), result = Array(length);
+  while (length--) {
+    result[fromRight ? length : ++index] = start;
+    start += step;
+  }
+  return result;
+}
+function createRange(fromRight) {
+  return function(start, end, step) {
+    if (step && typeof step != "number" && isIterateeCall(start, end, step)) {
+      end = step = void 0;
+    }
+    start = toFinite(start);
+    if (end === void 0) {
+      end = start;
+      start = 0;
+    } else {
+      end = toFinite(end);
+    }
+    step = step === void 0 ? start < end ? 1 : -1 : toFinite(step);
+    return baseRange(start, end, step, fromRight);
+  };
+}
+var range = createRange();
+const range$1 = range;
+var sortBy = baseRest(function(collection, iteratees) {
+  if (collection == null) {
+    return [];
+  }
+  var length = iteratees.length;
+  if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+    iteratees = [];
+  } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+    iteratees = [iteratees[0]];
+  }
+  return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+});
+const sortBy$1 = sortBy;
+var idCounter = 0;
+function uniqueId(prefix) {
+  var id = ++idCounter;
+  return toString(prefix) + id;
+}
+function baseZipObject(props, values2, assignFunc) {
+  var index = -1, length = props.length, valsLength = values2.length, result = {};
+  while (++index < length) {
+    var value = index < valsLength ? values2[index] : void 0;
+    assignFunc(result, props[index], value);
+  }
+  return result;
+}
+function zipObject(props, values2) {
+  return baseZipObject(props || [], values2 || [], assignValue);
+}
+class List {
+  constructor() {
+    var sentinel = {};
+    sentinel._next = sentinel._prev = sentinel;
+    this._sentinel = sentinel;
+  }
+  dequeue() {
+    var sentinel = this._sentinel;
+    var entry = sentinel._prev;
+    if (entry !== sentinel) {
+      unlink(entry);
+      return entry;
+    }
+  }
+  enqueue(entry) {
+    var sentinel = this._sentinel;
+    if (entry._prev && entry._next) {
+      unlink(entry);
+    }
+    entry._next = sentinel._next;
+    sentinel._next._prev = entry;
+    sentinel._next = entry;
+    entry._prev = sentinel;
+  }
+  toString() {
+    var strs = [];
+    var sentinel = this._sentinel;
+    var curr = sentinel._prev;
+    while (curr !== sentinel) {
+      strs.push(JSON.stringify(curr, filterOutLinks));
+      curr = curr._prev;
+    }
+    return "[" + strs.join(", ") + "]";
+  }
+}
+function unlink(entry) {
+  entry._prev._next = entry._next;
+  entry._next._prev = entry._prev;
+  delete entry._next;
+  delete entry._prev;
+}
+function filterOutLinks(k, v) {
+  if (k !== "_next" && k !== "_prev") {
+    return v;
+  }
+}
+var DEFAULT_WEIGHT_FN = constant(1);
+function greedyFAS(g, weightFn) {
+  if (g.nodeCount() <= 1) {
+    return [];
+  }
+  var state = buildState(g, weightFn || DEFAULT_WEIGHT_FN);
+  var results = doGreedyFAS(state.graph, state.buckets, state.zeroIdx);
+  return flatten(
+    map(results, function(e) {
+      return g.outEdges(e.v, e.w);
+    })
+  );
+}
+function doGreedyFAS(g, buckets, zeroIdx) {
+  var results = [];
+  var sources = buckets[buckets.length - 1];
+  var sinks = buckets[0];
+  var entry;
+  while (g.nodeCount()) {
+    while (entry = sinks.dequeue()) {
+      removeNode(g, buckets, zeroIdx, entry);
+    }
+    while (entry = sources.dequeue()) {
+      removeNode(g, buckets, zeroIdx, entry);
+    }
+    if (g.nodeCount()) {
+      for (var i = buckets.length - 2; i > 0; --i) {
+        entry = buckets[i].dequeue();
+        if (entry) {
+          results = results.concat(removeNode(g, buckets, zeroIdx, entry, true));
+          break;
+        }
+      }
+    }
+  }
+  return results;
+}
+function removeNode(g, buckets, zeroIdx, entry, collectPredecessors) {
+  var results = collectPredecessors ? [] : void 0;
+  forEach(g.inEdges(entry.v), function(edge) {
+    var weight = g.edge(edge);
+    var uEntry = g.node(edge.v);
+    if (collectPredecessors) {
+      results.push({ v: edge.v, w: edge.w });
+    }
+    uEntry.out -= weight;
+    assignBucket(buckets, zeroIdx, uEntry);
+  });
+  forEach(g.outEdges(entry.v), function(edge) {
+    var weight = g.edge(edge);
+    var w = edge.w;
+    var wEntry = g.node(w);
+    wEntry["in"] -= weight;
+    assignBucket(buckets, zeroIdx, wEntry);
+  });
+  g.removeNode(entry.v);
+  return results;
+}
+function buildState(g, weightFn) {
+  var fasGraph = new Graph();
+  var maxIn = 0;
+  var maxOut = 0;
+  forEach(g.nodes(), function(v) {
+    fasGraph.setNode(v, { v, in: 0, out: 0 });
+  });
+  forEach(g.edges(), function(e) {
+    var prevWeight = fasGraph.edge(e.v, e.w) || 0;
+    var weight = weightFn(e);
+    var edgeWeight = prevWeight + weight;
+    fasGraph.setEdge(e.v, e.w, edgeWeight);
+    maxOut = Math.max(maxOut, fasGraph.node(e.v).out += weight);
+    maxIn = Math.max(maxIn, fasGraph.node(e.w)["in"] += weight);
+  });
+  var buckets = range$1(maxOut + maxIn + 3).map(function() {
+    return new List();
+  });
+  var zeroIdx = maxIn + 1;
+  forEach(fasGraph.nodes(), function(v) {
+    assignBucket(buckets, zeroIdx, fasGraph.node(v));
+  });
+  return { graph: fasGraph, buckets, zeroIdx };
+}
+function assignBucket(buckets, zeroIdx, entry) {
+  if (!entry.out) {
+    buckets[0].enqueue(entry);
+  } else if (!entry["in"]) {
+    buckets[buckets.length - 1].enqueue(entry);
+  } else {
+    buckets[entry.out - entry["in"] + zeroIdx].enqueue(entry);
+  }
+}
+function run$2(g) {
+  var fas = g.graph().acyclicer === "greedy" ? greedyFAS(g, weightFn(g)) : dfsFAS(g);
+  forEach(fas, function(e) {
+    var label = g.edge(e);
+    g.removeEdge(e);
+    label.forwardName = e.name;
+    label.reversed = true;
+    g.setEdge(e.w, e.v, label, uniqueId("rev"));
+  });
+  function weightFn(g2) {
+    return function(e) {
+      return g2.edge(e).weight;
+    };
+  }
+}
+function dfsFAS(g) {
+  var fas = [];
+  var stack = {};
+  var visited = {};
+  function dfs2(v) {
+    if (has(visited, v)) {
+      return;
+    }
+    visited[v] = true;
+    stack[v] = true;
+    forEach(g.outEdges(v), function(e) {
+      if (has(stack, e.w)) {
+        fas.push(e);
+      } else {
+        dfs2(e.w);
+      }
+    });
+    delete stack[v];
+  }
+  forEach(g.nodes(), dfs2);
+  return fas;
+}
+function undo$2(g) {
+  forEach(g.edges(), function(e) {
+    var label = g.edge(e);
+    if (label.reversed) {
+      g.removeEdge(e);
+      var forwardName = label.forwardName;
+      delete label.reversed;
+      delete label.forwardName;
+      g.setEdge(e.w, e.v, label, forwardName);
+    }
+  });
+}
+function addDummyNode(g, type, attrs, name) {
+  var v;
+  do {
+    v = uniqueId(name);
+  } while (g.hasNode(v));
+  attrs.dummy = type;
+  g.setNode(v, attrs);
+  return v;
+}
+function simplify(g) {
+  var simplified = new Graph().setGraph(g.graph());
+  forEach(g.nodes(), function(v) {
+    simplified.setNode(v, g.node(v));
+  });
+  forEach(g.edges(), function(e) {
+    var simpleLabel = simplified.edge(e.v, e.w) || { weight: 0, minlen: 1 };
+    var label = g.edge(e);
+    simplified.setEdge(e.v, e.w, {
+      weight: simpleLabel.weight + label.weight,
+      minlen: Math.max(simpleLabel.minlen, label.minlen)
+    });
+  });
+  return simplified;
+}
+function asNonCompoundGraph(g) {
+  var simplified = new Graph({ multigraph: g.isMultigraph() }).setGraph(g.graph());
+  forEach(g.nodes(), function(v) {
+    if (!g.children(v).length) {
+      simplified.setNode(v, g.node(v));
+    }
+  });
+  forEach(g.edges(), function(e) {
+    simplified.setEdge(e, g.edge(e));
+  });
+  return simplified;
+}
+function intersectRect(rect, point) {
+  var x = rect.x;
+  var y = rect.y;
+  var dx = point.x - x;
+  var dy = point.y - y;
+  var w = rect.width / 2;
+  var h = rect.height / 2;
+  if (!dx && !dy) {
+    throw new Error("Not possible to find intersection inside of the rectangle");
+  }
+  var sx, sy;
+  if (Math.abs(dy) * w > Math.abs(dx) * h) {
+    if (dy < 0) {
+      h = -h;
+    }
+    sx = h * dx / dy;
+    sy = h;
+  } else {
+    if (dx < 0) {
+      w = -w;
+    }
+    sx = w;
+    sy = w * dy / dx;
+  }
+  return { x: x + sx, y: y + sy };
+}
+function buildLayerMatrix(g) {
+  var layering = map(range$1(maxRank(g) + 1), function() {
+    return [];
+  });
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v);
+    var rank2 = node.rank;
+    if (!isUndefined(rank2)) {
+      layering[rank2][node.order] = v;
+    }
+  });
+  return layering;
+}
+function normalizeRanks(g) {
+  var min$1 = min(
+    map(g.nodes(), function(v) {
+      return g.node(v).rank;
+    })
+  );
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (has(node, "rank")) {
+      node.rank -= min$1;
+    }
+  });
+}
+function removeEmptyRanks(g) {
+  var offset = min(
+    map(g.nodes(), function(v) {
+      return g.node(v).rank;
+    })
+  );
+  var layers = [];
+  forEach(g.nodes(), function(v) {
+    var rank2 = g.node(v).rank - offset;
+    if (!layers[rank2]) {
+      layers[rank2] = [];
+    }
+    layers[rank2].push(v);
+  });
+  var delta = 0;
+  var nodeRankFactor = g.graph().nodeRankFactor;
+  forEach(layers, function(vs, i) {
+    if (isUndefined(vs) && i % nodeRankFactor !== 0) {
+      --delta;
+    } else if (delta) {
+      forEach(vs, function(v) {
+        g.node(v).rank += delta;
+      });
+    }
+  });
+}
+function addBorderNode$1(g, prefix, rank2, order2) {
+  var node = {
+    width: 0,
+    height: 0
+  };
+  if (arguments.length >= 4) {
+    node.rank = rank2;
+    node.order = order2;
+  }
+  return addDummyNode(g, "border", node, prefix);
+}
+function maxRank(g) {
+  return max(
+    map(g.nodes(), function(v) {
+      var rank2 = g.node(v).rank;
+      if (!isUndefined(rank2)) {
+        return rank2;
+      }
+    })
+  );
+}
+function partition(collection, fn) {
+  var result = { lhs: [], rhs: [] };
+  forEach(collection, function(value) {
+    if (fn(value)) {
+      result.lhs.push(value);
+    } else {
+      result.rhs.push(value);
+    }
+  });
+  return result;
+}
+function time(name, fn) {
+  var start = now$1();
+  try {
+    return fn();
+  } finally {
+    console.log(name + " time: " + (now$1() - start) + "ms");
+  }
+}
+function notime(name, fn) {
+  return fn();
+}
+function addBorderSegments(g) {
+  function dfs2(v) {
+    var children = g.children(v);
+    var node = g.node(v);
+    if (children.length) {
+      forEach(children, dfs2);
+    }
+    if (has(node, "minRank")) {
+      node.borderLeft = [];
+      node.borderRight = [];
+      for (var rank2 = node.minRank, maxRank2 = node.maxRank + 1; rank2 < maxRank2; ++rank2) {
+        addBorderNode(g, "borderLeft", "_bl", v, node, rank2);
+        addBorderNode(g, "borderRight", "_br", v, node, rank2);
+      }
+    }
+  }
+  forEach(g.children(), dfs2);
+}
+function addBorderNode(g, prop, prefix, sg, sgNode, rank2) {
+  var label = { width: 0, height: 0, rank: rank2, borderType: prop };
+  var prev = sgNode[prop][rank2 - 1];
+  var curr = addDummyNode(g, "border", label, prefix);
+  sgNode[prop][rank2] = curr;
+  g.setParent(curr, sg);
+  if (prev) {
+    g.setEdge(prev, curr, { weight: 1 });
+  }
+}
+function adjust(g) {
+  var rankDir = g.graph().rankdir.toLowerCase();
+  if (rankDir === "lr" || rankDir === "rl") {
+    swapWidthHeight(g);
+  }
+}
+function undo$1(g) {
+  var rankDir = g.graph().rankdir.toLowerCase();
+  if (rankDir === "bt" || rankDir === "rl") {
+    reverseY(g);
+  }
+  if (rankDir === "lr" || rankDir === "rl") {
+    swapXY(g);
+    swapWidthHeight(g);
+  }
+}
+function swapWidthHeight(g) {
+  forEach(g.nodes(), function(v) {
+    swapWidthHeightOne(g.node(v));
+  });
+  forEach(g.edges(), function(e) {
+    swapWidthHeightOne(g.edge(e));
+  });
+}
+function swapWidthHeightOne(attrs) {
+  var w = attrs.width;
+  attrs.width = attrs.height;
+  attrs.height = w;
+}
+function reverseY(g) {
+  forEach(g.nodes(), function(v) {
+    reverseYOne(g.node(v));
+  });
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    forEach(edge.points, reverseYOne);
+    if (has(edge, "y")) {
+      reverseYOne(edge);
+    }
+  });
+}
+function reverseYOne(attrs) {
+  attrs.y = -attrs.y;
+}
+function swapXY(g) {
+  forEach(g.nodes(), function(v) {
+    swapXYOne(g.node(v));
+  });
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    forEach(edge.points, swapXYOne);
+    if (has(edge, "x")) {
+      swapXYOne(edge);
+    }
+  });
+}
+function swapXYOne(attrs) {
+  var x = attrs.x;
+  attrs.x = attrs.y;
+  attrs.y = x;
+}
+function run$1(g) {
+  g.graph().dummyChains = [];
+  forEach(g.edges(), function(edge) {
+    normalizeEdge(g, edge);
+  });
+}
+function normalizeEdge(g, e) {
+  var v = e.v;
+  var vRank = g.node(v).rank;
+  var w = e.w;
+  var wRank = g.node(w).rank;
+  var name = e.name;
+  var edgeLabel = g.edge(e);
+  var labelRank = edgeLabel.labelRank;
+  if (wRank === vRank + 1)
+    return;
+  g.removeEdge(e);
+  var dummy, attrs, i;
+  for (i = 0, ++vRank; vRank < wRank; ++i, ++vRank) {
+    edgeLabel.points = [];
+    attrs = {
+      width: 0,
+      height: 0,
+      edgeLabel,
+      edgeObj: e,
+      rank: vRank
+    };
+    dummy = addDummyNode(g, "edge", attrs, "_d");
+    if (vRank === labelRank) {
+      attrs.width = edgeLabel.width;
+      attrs.height = edgeLabel.height;
+      attrs.dummy = "edge-label";
+      attrs.labelpos = edgeLabel.labelpos;
+    }
+    g.setEdge(v, dummy, { weight: edgeLabel.weight }, name);
+    if (i === 0) {
+      g.graph().dummyChains.push(dummy);
+    }
+    v = dummy;
+  }
+  g.setEdge(v, w, { weight: edgeLabel.weight }, name);
+}
+function undo(g) {
+  forEach(g.graph().dummyChains, function(v) {
+    var node = g.node(v);
+    var origLabel = node.edgeLabel;
+    var w;
+    g.setEdge(node.edgeObj, origLabel);
+    while (node.dummy) {
+      w = g.successors(v)[0];
+      g.removeNode(v);
+      origLabel.points.push({ x: node.x, y: node.y });
+      if (node.dummy === "edge-label") {
+        origLabel.x = node.x;
+        origLabel.y = node.y;
+        origLabel.width = node.width;
+        origLabel.height = node.height;
+      }
+      v = w;
+      node = g.node(v);
+    }
+  });
+}
+function longestPath(g) {
+  var visited = {};
+  function dfs2(v) {
+    var label = g.node(v);
+    if (has(visited, v)) {
+      return label.rank;
+    }
+    visited[v] = true;
+    var rank2 = min(
+      map(g.outEdges(v), function(e) {
+        return dfs2(e.w) - g.edge(e).minlen;
+      })
+    );
+    if (rank2 === Number.POSITIVE_INFINITY || // return value of _.map([]) for Lodash 3
+    rank2 === void 0 || // return value of _.map([]) for Lodash 4
+    rank2 === null) {
+      rank2 = 0;
+    }
+    return label.rank = rank2;
+  }
+  forEach(g.sources(), dfs2);
+}
+function slack(g, e) {
+  return g.node(e.w).rank - g.node(e.v).rank - g.edge(e).minlen;
+}
+function feasibleTree(g) {
+  var t = new Graph({ directed: false });
+  var start = g.nodes()[0];
+  var size = g.nodeCount();
+  t.setNode(start, {});
+  var edge, delta;
+  while (tightTree(t, g) < size) {
+    edge = findMinSlackEdge(t, g);
+    delta = t.hasNode(edge.v) ? slack(g, edge) : -slack(g, edge);
+    shiftRanks(t, g, delta);
+  }
+  return t;
+}
+function tightTree(t, g) {
+  function dfs2(v) {
+    forEach(g.nodeEdges(v), function(e) {
+      var edgeV = e.v, w = v === edgeV ? e.w : edgeV;
+      if (!t.hasNode(w) && !slack(g, e)) {
+        t.setNode(w, {});
+        t.setEdge(v, w, {});
+        dfs2(w);
+      }
+    });
+  }
+  forEach(t.nodes(), dfs2);
+  return t.nodeCount();
+}
+function findMinSlackEdge(t, g) {
+  return minBy(g.edges(), function(e) {
+    if (t.hasNode(e.v) !== t.hasNode(e.w)) {
+      return slack(g, e);
+    }
+  });
+}
+function shiftRanks(t, g, delta) {
+  forEach(t.nodes(), function(v) {
+    g.node(v).rank += delta;
+  });
+}
+function CycleException() {
+}
+CycleException.prototype = new Error();
+function dfs$1(g, vs, order2) {
+  if (!isArray(vs)) {
+    vs = [vs];
+  }
+  var navigation = (g.isDirected() ? g.successors : g.neighbors).bind(g);
+  var acc = [];
+  var visited = {};
+  forEach(vs, function(v) {
+    if (!g.hasNode(v)) {
+      throw new Error("Graph does not have node: " + v);
+    }
+    doDfs(g, v, order2 === "post", visited, navigation, acc);
+  });
+  return acc;
+}
+function doDfs(g, v, postorder2, visited, navigation, acc) {
+  if (!has(visited, v)) {
+    visited[v] = true;
+    if (!postorder2) {
+      acc.push(v);
+    }
+    forEach(navigation(v), function(w) {
+      doDfs(g, w, postorder2, visited, navigation, acc);
+    });
+    if (postorder2) {
+      acc.push(v);
+    }
+  }
+}
+function postorder$1(g, vs) {
+  return dfs$1(g, vs, "post");
+}
+function preorder(g, vs) {
+  return dfs$1(g, vs, "pre");
+}
+networkSimplex.initLowLimValues = initLowLimValues;
+networkSimplex.initCutValues = initCutValues;
+networkSimplex.calcCutValue = calcCutValue;
+networkSimplex.leaveEdge = leaveEdge;
+networkSimplex.enterEdge = enterEdge;
+networkSimplex.exchangeEdges = exchangeEdges;
+function networkSimplex(g) {
+  g = simplify(g);
+  longestPath(g);
+  var t = feasibleTree(g);
+  initLowLimValues(t);
+  initCutValues(t, g);
+  var e, f;
+  while (e = leaveEdge(t)) {
+    f = enterEdge(t, g, e);
+    exchangeEdges(t, g, e, f);
+  }
+}
+function initCutValues(t, g) {
+  var vs = postorder$1(t, t.nodes());
+  vs = vs.slice(0, vs.length - 1);
+  forEach(vs, function(v) {
+    assignCutValue(t, g, v);
+  });
+}
+function assignCutValue(t, g, child) {
+  var childLab = t.node(child);
+  var parent = childLab.parent;
+  t.edge(child, parent).cutvalue = calcCutValue(t, g, child);
+}
+function calcCutValue(t, g, child) {
+  var childLab = t.node(child);
+  var parent = childLab.parent;
+  var childIsTail = true;
+  var graphEdge = g.edge(child, parent);
+  var cutValue = 0;
+  if (!graphEdge) {
+    childIsTail = false;
+    graphEdge = g.edge(parent, child);
+  }
+  cutValue = graphEdge.weight;
+  forEach(g.nodeEdges(child), function(e) {
+    var isOutEdge = e.v === child, other = isOutEdge ? e.w : e.v;
+    if (other !== parent) {
+      var pointsToHead = isOutEdge === childIsTail, otherWeight = g.edge(e).weight;
+      cutValue += pointsToHead ? otherWeight : -otherWeight;
+      if (isTreeEdge(t, child, other)) {
+        var otherCutValue = t.edge(child, other).cutvalue;
+        cutValue += pointsToHead ? -otherCutValue : otherCutValue;
+      }
+    }
+  });
+  return cutValue;
+}
+function initLowLimValues(tree, root2) {
+  if (arguments.length < 2) {
+    root2 = tree.nodes()[0];
+  }
+  dfsAssignLowLim(tree, {}, 1, root2);
+}
+function dfsAssignLowLim(tree, visited, nextLim, v, parent) {
+  var low = nextLim;
+  var label = tree.node(v);
+  visited[v] = true;
+  forEach(tree.neighbors(v), function(w) {
+    if (!has(visited, w)) {
+      nextLim = dfsAssignLowLim(tree, visited, nextLim, w, v);
+    }
+  });
+  label.low = low;
+  label.lim = nextLim++;
+  if (parent) {
+    label.parent = parent;
+  } else {
+    delete label.parent;
+  }
+  return nextLim;
+}
+function leaveEdge(tree) {
+  return find$1(tree.edges(), function(e) {
+    return tree.edge(e).cutvalue < 0;
+  });
+}
+function enterEdge(t, g, edge) {
+  var v = edge.v;
+  var w = edge.w;
+  if (!g.hasEdge(v, w)) {
+    v = edge.w;
+    w = edge.v;
+  }
+  var vLabel = t.node(v);
+  var wLabel = t.node(w);
+  var tailLabel = vLabel;
+  var flip = false;
+  if (vLabel.lim > wLabel.lim) {
+    tailLabel = wLabel;
+    flip = true;
+  }
+  var candidates = filter(g.edges(), function(edge2) {
+    return flip === isDescendant(t, t.node(edge2.v), tailLabel) && flip !== isDescendant(t, t.node(edge2.w), tailLabel);
+  });
+  return minBy(candidates, function(edge2) {
+    return slack(g, edge2);
+  });
+}
+function exchangeEdges(t, g, e, f) {
+  var v = e.v;
+  var w = e.w;
+  t.removeEdge(v, w);
+  t.setEdge(f.v, f.w, {});
+  initLowLimValues(t);
+  initCutValues(t, g);
+  updateRanks(t, g);
+}
+function updateRanks(t, g) {
+  var root2 = find$1(t.nodes(), function(v) {
+    return !g.node(v).parent;
+  });
+  var vs = preorder(t, root2);
+  vs = vs.slice(1);
+  forEach(vs, function(v) {
+    var parent = t.node(v).parent, edge = g.edge(v, parent), flipped = false;
+    if (!edge) {
+      edge = g.edge(parent, v);
+      flipped = true;
+    }
+    g.node(v).rank = g.node(parent).rank + (flipped ? edge.minlen : -edge.minlen);
+  });
+}
+function isTreeEdge(tree, u, v) {
+  return tree.hasEdge(u, v);
+}
+function isDescendant(tree, vLabel, rootLabel) {
+  return rootLabel.low <= vLabel.lim && vLabel.lim <= rootLabel.lim;
+}
+function rank(g) {
+  switch (g.graph().ranker) {
+    case "network-simplex":
+      networkSimplexRanker(g);
+      break;
+    case "tight-tree":
+      tightTreeRanker(g);
+      break;
+    case "longest-path":
+      longestPathRanker(g);
+      break;
+    default:
+      networkSimplexRanker(g);
+  }
+}
+var longestPathRanker = longestPath;
+function tightTreeRanker(g) {
+  longestPath(g);
+  feasibleTree(g);
+}
+function networkSimplexRanker(g) {
+  networkSimplex(g);
+}
+function run(g) {
+  var root2 = addDummyNode(g, "root", {}, "_root");
+  var depths = treeDepths(g);
+  var height = max(values(depths)) - 1;
+  var nodeSep = 2 * height + 1;
+  g.graph().nestingRoot = root2;
+  forEach(g.edges(), function(e) {
+    g.edge(e).minlen *= nodeSep;
+  });
+  var weight = sumWeights(g) + 1;
+  forEach(g.children(), function(child) {
+    dfs(g, root2, nodeSep, weight, height, depths, child);
+  });
+  g.graph().nodeRankFactor = nodeSep;
+}
+function dfs(g, root2, nodeSep, weight, height, depths, v) {
+  var children = g.children(v);
+  if (!children.length) {
+    if (v !== root2) {
+      g.setEdge(root2, v, { weight: 0, minlen: nodeSep });
+    }
+    return;
+  }
+  var top = addBorderNode$1(g, "_bt");
+  var bottom = addBorderNode$1(g, "_bb");
+  var label = g.node(v);
+  g.setParent(top, v);
+  label.borderTop = top;
+  g.setParent(bottom, v);
+  label.borderBottom = bottom;
+  forEach(children, function(child) {
+    dfs(g, root2, nodeSep, weight, height, depths, child);
+    var childNode = g.node(child);
+    var childTop = childNode.borderTop ? childNode.borderTop : child;
+    var childBottom = childNode.borderBottom ? childNode.borderBottom : child;
+    var thisWeight = childNode.borderTop ? weight : 2 * weight;
+    var minlen = childTop !== childBottom ? 1 : height - depths[v] + 1;
+    g.setEdge(top, childTop, {
+      weight: thisWeight,
+      minlen,
+      nestingEdge: true
+    });
+    g.setEdge(childBottom, bottom, {
+      weight: thisWeight,
+      minlen,
+      nestingEdge: true
+    });
+  });
+  if (!g.parent(v)) {
+    g.setEdge(root2, top, { weight: 0, minlen: height + depths[v] });
+  }
+}
+function treeDepths(g) {
+  var depths = {};
+  function dfs2(v, depth) {
+    var children = g.children(v);
+    if (children && children.length) {
+      forEach(children, function(child) {
+        dfs2(child, depth + 1);
+      });
+    }
+    depths[v] = depth;
+  }
+  forEach(g.children(), function(v) {
+    dfs2(v, 1);
+  });
+  return depths;
+}
+function sumWeights(g) {
+  return reduce(
+    g.edges(),
+    function(acc, e) {
+      return acc + g.edge(e).weight;
+    },
+    0
+  );
+}
+function cleanup(g) {
+  var graphLabel = g.graph();
+  g.removeNode(graphLabel.nestingRoot);
+  delete graphLabel.nestingRoot;
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (edge.nestingEdge) {
+      g.removeEdge(e);
+    }
+  });
+}
+function addSubgraphConstraints(g, cg, vs) {
+  var prev = {}, rootPrev;
+  forEach(vs, function(v) {
+    var child = g.parent(v), parent, prevChild;
+    while (child) {
+      parent = g.parent(child);
+      if (parent) {
+        prevChild = prev[parent];
+        prev[parent] = child;
+      } else {
+        prevChild = rootPrev;
+        rootPrev = child;
+      }
+      if (prevChild && prevChild !== child) {
+        cg.setEdge(prevChild, child);
+        return;
+      }
+      child = parent;
+    }
+  });
+}
+function buildLayerGraph(g, rank2, relationship) {
+  var root2 = createRootNode(g), result = new Graph({ compound: true }).setGraph({ root: root2 }).setDefaultNodeLabel(function(v) {
+    return g.node(v);
+  });
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v), parent = g.parent(v);
+    if (node.rank === rank2 || node.minRank <= rank2 && rank2 <= node.maxRank) {
+      result.setNode(v);
+      result.setParent(v, parent || root2);
+      forEach(g[relationship](v), function(e) {
+        var u = e.v === v ? e.w : e.v, edge = result.edge(u, v), weight = !isUndefined(edge) ? edge.weight : 0;
+        result.setEdge(u, v, { weight: g.edge(e).weight + weight });
+      });
+      if (has(node, "minRank")) {
+        result.setNode(v, {
+          borderLeft: node.borderLeft[rank2],
+          borderRight: node.borderRight[rank2]
+        });
+      }
+    }
+  });
+  return result;
+}
+function createRootNode(g) {
+  var v;
+  while (g.hasNode(v = uniqueId("_root")))
+    ;
+  return v;
+}
+function crossCount(g, layering) {
+  var cc = 0;
+  for (var i = 1; i < layering.length; ++i) {
+    cc += twoLayerCrossCount(g, layering[i - 1], layering[i]);
+  }
+  return cc;
+}
+function twoLayerCrossCount(g, northLayer, southLayer) {
+  var southPos = zipObject(
+    southLayer,
+    map(southLayer, function(v, i) {
+      return i;
+    })
+  );
+  var southEntries = flatten(
+    map(northLayer, function(v) {
+      return sortBy$1(
+        map(g.outEdges(v), function(e) {
+          return { pos: southPos[e.w], weight: g.edge(e).weight };
+        }),
+        "pos"
+      );
+    })
+  );
+  var firstIndex = 1;
+  while (firstIndex < southLayer.length)
+    firstIndex <<= 1;
+  var treeSize = 2 * firstIndex - 1;
+  firstIndex -= 1;
+  var tree = map(new Array(treeSize), function() {
+    return 0;
+  });
+  var cc = 0;
+  forEach(
+    // @ts-expect-error
+    southEntries.forEach(function(entry) {
+      var index = entry.pos + firstIndex;
+      tree[index] += entry.weight;
+      var weightSum = 0;
+      while (index > 0) {
+        if (index % 2) {
+          weightSum += tree[index + 1];
+        }
+        index = index - 1 >> 1;
+        tree[index] += entry.weight;
+      }
+      cc += entry.weight * weightSum;
+    })
+  );
+  return cc;
+}
+function initOrder(g) {
+  var visited = {};
+  var simpleNodes = filter(g.nodes(), function(v) {
+    return !g.children(v).length;
+  });
+  var maxRank2 = max(
+    map(simpleNodes, function(v) {
+      return g.node(v).rank;
+    })
+  );
+  var layers = map(range$1(maxRank2 + 1), function() {
+    return [];
+  });
+  function dfs2(v) {
+    if (has(visited, v))
+      return;
+    visited[v] = true;
+    var node = g.node(v);
+    layers[node.rank].push(v);
+    forEach(g.successors(v), dfs2);
+  }
+  var orderedVs = sortBy$1(simpleNodes, function(v) {
+    return g.node(v).rank;
+  });
+  forEach(orderedVs, dfs2);
+  return layers;
+}
+function barycenter(g, movable) {
+  return map(movable, function(v) {
+    var inV = g.inEdges(v);
+    if (!inV.length) {
+      return { v };
+    } else {
+      var result = reduce(
+        inV,
+        function(acc, e) {
+          var edge = g.edge(e), nodeU = g.node(e.v);
+          return {
+            sum: acc.sum + edge.weight * nodeU.order,
+            weight: acc.weight + edge.weight
+          };
+        },
+        { sum: 0, weight: 0 }
+      );
+      return {
+        v,
+        barycenter: result.sum / result.weight,
+        weight: result.weight
+      };
+    }
+  });
+}
+function resolveConflicts(entries, cg) {
+  var mappedEntries = {};
+  forEach(entries, function(entry, i) {
+    var tmp = mappedEntries[entry.v] = {
+      indegree: 0,
+      in: [],
+      out: [],
+      vs: [entry.v],
+      i
+    };
+    if (!isUndefined(entry.barycenter)) {
+      tmp.barycenter = entry.barycenter;
+      tmp.weight = entry.weight;
+    }
+  });
+  forEach(cg.edges(), function(e) {
+    var entryV = mappedEntries[e.v];
+    var entryW = mappedEntries[e.w];
+    if (!isUndefined(entryV) && !isUndefined(entryW)) {
+      entryW.indegree++;
+      entryV.out.push(mappedEntries[e.w]);
+    }
+  });
+  var sourceSet = filter(mappedEntries, function(entry) {
+    return !entry.indegree;
+  });
+  return doResolveConflicts(sourceSet);
+}
+function doResolveConflicts(sourceSet) {
+  var entries = [];
+  function handleIn(vEntry) {
+    return function(uEntry) {
+      if (uEntry.merged) {
+        return;
+      }
+      if (isUndefined(uEntry.barycenter) || isUndefined(vEntry.barycenter) || uEntry.barycenter >= vEntry.barycenter) {
+        mergeEntries(vEntry, uEntry);
+      }
+    };
+  }
+  function handleOut(vEntry) {
+    return function(wEntry) {
+      wEntry["in"].push(vEntry);
+      if (--wEntry.indegree === 0) {
+        sourceSet.push(wEntry);
+      }
+    };
+  }
+  while (sourceSet.length) {
+    var entry = sourceSet.pop();
+    entries.push(entry);
+    forEach(entry["in"].reverse(), handleIn(entry));
+    forEach(entry.out, handleOut(entry));
+  }
+  return map(
+    filter(entries, function(entry2) {
+      return !entry2.merged;
+    }),
+    function(entry2) {
+      return pick$1(entry2, ["vs", "i", "barycenter", "weight"]);
+    }
+  );
+}
+function mergeEntries(target, source) {
+  var sum = 0;
+  var weight = 0;
+  if (target.weight) {
+    sum += target.barycenter * target.weight;
+    weight += target.weight;
+  }
+  if (source.weight) {
+    sum += source.barycenter * source.weight;
+    weight += source.weight;
+  }
+  target.vs = source.vs.concat(target.vs);
+  target.barycenter = sum / weight;
+  target.weight = weight;
+  target.i = Math.min(source.i, target.i);
+  source.merged = true;
+}
+function sort(entries, biasRight) {
+  var parts = partition(entries, function(entry) {
+    return has(entry, "barycenter");
+  });
+  var sortable = parts.lhs, unsortable = sortBy$1(parts.rhs, function(entry) {
+    return -entry.i;
+  }), vs = [], sum = 0, weight = 0, vsIndex = 0;
+  sortable.sort(compareWithBias(!!biasRight));
+  vsIndex = consumeUnsortable(vs, unsortable, vsIndex);
+  forEach(sortable, function(entry) {
+    vsIndex += entry.vs.length;
+    vs.push(entry.vs);
+    sum += entry.barycenter * entry.weight;
+    weight += entry.weight;
+    vsIndex = consumeUnsortable(vs, unsortable, vsIndex);
+  });
+  var result = { vs: flatten(vs) };
+  if (weight) {
+    result.barycenter = sum / weight;
+    result.weight = weight;
+  }
+  return result;
+}
+function consumeUnsortable(vs, unsortable, index) {
+  var last$1;
+  while (unsortable.length && (last$1 = last(unsortable)).i <= index) {
+    unsortable.pop();
+    vs.push(last$1.vs);
+    index++;
+  }
+  return index;
+}
+function compareWithBias(bias) {
+  return function(entryV, entryW) {
+    if (entryV.barycenter < entryW.barycenter) {
+      return -1;
+    } else if (entryV.barycenter > entryW.barycenter) {
+      return 1;
+    }
+    return !bias ? entryV.i - entryW.i : entryW.i - entryV.i;
+  };
+}
+function sortSubgraph(g, v, cg, biasRight) {
+  var movable = g.children(v);
+  var node = g.node(v);
+  var bl = node ? node.borderLeft : void 0;
+  var br = node ? node.borderRight : void 0;
+  var subgraphs = {};
+  if (bl) {
+    movable = filter(movable, function(w) {
+      return w !== bl && w !== br;
+    });
+  }
+  var barycenters = barycenter(g, movable);
+  forEach(barycenters, function(entry) {
+    if (g.children(entry.v).length) {
+      var subgraphResult = sortSubgraph(g, entry.v, cg, biasRight);
+      subgraphs[entry.v] = subgraphResult;
+      if (has(subgraphResult, "barycenter")) {
+        mergeBarycenters(entry, subgraphResult);
+      }
+    }
+  });
+  var entries = resolveConflicts(barycenters, cg);
+  expandSubgraphs(entries, subgraphs);
+  var result = sort(entries, biasRight);
+  if (bl) {
+    result.vs = flatten([bl, result.vs, br]);
+    if (g.predecessors(bl).length) {
+      var blPred = g.node(g.predecessors(bl)[0]), brPred = g.node(g.predecessors(br)[0]);
+      if (!has(result, "barycenter")) {
+        result.barycenter = 0;
+        result.weight = 0;
+      }
+      result.barycenter = (result.barycenter * result.weight + blPred.order + brPred.order) / (result.weight + 2);
+      result.weight += 2;
+    }
+  }
+  return result;
+}
+function expandSubgraphs(entries, subgraphs) {
+  forEach(entries, function(entry) {
+    entry.vs = flatten(
+      entry.vs.map(function(v) {
+        if (subgraphs[v]) {
+          return subgraphs[v].vs;
+        }
+        return v;
+      })
+    );
+  });
+}
+function mergeBarycenters(target, other) {
+  if (!isUndefined(target.barycenter)) {
+    target.barycenter = (target.barycenter * target.weight + other.barycenter * other.weight) / (target.weight + other.weight);
+    target.weight += other.weight;
+  } else {
+    target.barycenter = other.barycenter;
+    target.weight = other.weight;
+  }
+}
+function order(g) {
+  var maxRank$1 = maxRank(g), downLayerGraphs = buildLayerGraphs(g, range$1(1, maxRank$1 + 1), "inEdges"), upLayerGraphs = buildLayerGraphs(g, range$1(maxRank$1 - 1, -1, -1), "outEdges");
+  var layering = initOrder(g);
+  assignOrder(g, layering);
+  var bestCC = Number.POSITIVE_INFINITY, best;
+  for (var i = 0, lastBest = 0; lastBest < 4; ++i, ++lastBest) {
+    sweepLayerGraphs(i % 2 ? downLayerGraphs : upLayerGraphs, i % 4 >= 2);
+    layering = buildLayerMatrix(g);
+    var cc = crossCount(g, layering);
+    if (cc < bestCC) {
+      lastBest = 0;
+      best = cloneDeep(layering);
+      bestCC = cc;
+    }
+  }
+  assignOrder(g, best);
+}
+function buildLayerGraphs(g, ranks, relationship) {
+  return map(ranks, function(rank2) {
+    return buildLayerGraph(g, rank2, relationship);
+  });
+}
+function sweepLayerGraphs(layerGraphs, biasRight) {
+  var cg = new Graph();
+  forEach(layerGraphs, function(lg) {
+    var root2 = lg.graph().root;
+    var sorted = sortSubgraph(lg, root2, cg, biasRight);
+    forEach(sorted.vs, function(v, i) {
+      lg.node(v).order = i;
+    });
+    addSubgraphConstraints(lg, cg, sorted.vs);
+  });
+}
+function assignOrder(g, layering) {
+  forEach(layering, function(layer) {
+    forEach(layer, function(v, i) {
+      g.node(v).order = i;
+    });
+  });
+}
+function parentDummyChains(g) {
+  var postorderNums = postorder(g);
+  forEach(g.graph().dummyChains, function(v) {
+    var node = g.node(v);
+    var edgeObj = node.edgeObj;
+    var pathData = findPath(g, postorderNums, edgeObj.v, edgeObj.w);
+    var path = pathData.path;
+    var lca = pathData.lca;
+    var pathIdx = 0;
+    var pathV = path[pathIdx];
+    var ascending = true;
+    while (v !== edgeObj.w) {
+      node = g.node(v);
+      if (ascending) {
+        while ((pathV = path[pathIdx]) !== lca && g.node(pathV).maxRank < node.rank) {
+          pathIdx++;
+        }
+        if (pathV === lca) {
+          ascending = false;
+        }
+      }
+      if (!ascending) {
+        while (pathIdx < path.length - 1 && g.node(pathV = path[pathIdx + 1]).minRank <= node.rank) {
+          pathIdx++;
+        }
+        pathV = path[pathIdx];
+      }
+      g.setParent(v, pathV);
+      v = g.successors(v)[0];
+    }
+  });
+}
+function findPath(g, postorderNums, v, w) {
+  var vPath = [];
+  var wPath = [];
+  var low = Math.min(postorderNums[v].low, postorderNums[w].low);
+  var lim = Math.max(postorderNums[v].lim, postorderNums[w].lim);
+  var parent;
+  var lca;
+  parent = v;
+  do {
+    parent = g.parent(parent);
+    vPath.push(parent);
+  } while (parent && (postorderNums[parent].low > low || lim > postorderNums[parent].lim));
+  lca = parent;
+  parent = w;
+  while ((parent = g.parent(parent)) !== lca) {
+    wPath.push(parent);
+  }
+  return { path: vPath.concat(wPath.reverse()), lca };
+}
+function postorder(g) {
+  var result = {};
+  var lim = 0;
+  function dfs2(v) {
+    var low = lim;
+    forEach(g.children(v), dfs2);
+    result[v] = { low, lim: lim++ };
+  }
+  forEach(g.children(), dfs2);
+  return result;
+}
+function findType1Conflicts(g, layering) {
+  var conflicts = {};
+  function visitLayer(prevLayer, layer) {
+    var k0 = 0, scanPos = 0, prevLayerLength = prevLayer.length, lastNode = last(layer);
+    forEach(layer, function(v, i) {
+      var w = findOtherInnerSegmentNode(g, v), k1 = w ? g.node(w).order : prevLayerLength;
+      if (w || v === lastNode) {
+        forEach(layer.slice(scanPos, i + 1), function(scanNode) {
+          forEach(g.predecessors(scanNode), function(u) {
+            var uLabel = g.node(u), uPos = uLabel.order;
+            if ((uPos < k0 || k1 < uPos) && !(uLabel.dummy && g.node(scanNode).dummy)) {
+              addConflict(conflicts, u, scanNode);
+            }
+          });
+        });
+        scanPos = i + 1;
+        k0 = k1;
+      }
+    });
+    return layer;
+  }
+  reduce(layering, visitLayer);
+  return conflicts;
+}
+function findType2Conflicts(g, layering) {
+  var conflicts = {};
+  function scan(south, southPos, southEnd, prevNorthBorder, nextNorthBorder) {
+    var v;
+    forEach(range$1(southPos, southEnd), function(i) {
+      v = south[i];
+      if (g.node(v).dummy) {
+        forEach(g.predecessors(v), function(u) {
+          var uNode = g.node(u);
+          if (uNode.dummy && (uNode.order < prevNorthBorder || uNode.order > nextNorthBorder)) {
+            addConflict(conflicts, u, v);
+          }
+        });
+      }
+    });
+  }
+  function visitLayer(north, south) {
+    var prevNorthPos = -1, nextNorthPos, southPos = 0;
+    forEach(south, function(v, southLookahead) {
+      if (g.node(v).dummy === "border") {
+        var predecessors = g.predecessors(v);
+        if (predecessors.length) {
+          nextNorthPos = g.node(predecessors[0]).order;
+          scan(south, southPos, southLookahead, prevNorthPos, nextNorthPos);
+          southPos = southLookahead;
+          prevNorthPos = nextNorthPos;
+        }
+      }
+      scan(south, southPos, south.length, nextNorthPos, north.length);
+    });
+    return south;
+  }
+  reduce(layering, visitLayer);
+  return conflicts;
+}
+function findOtherInnerSegmentNode(g, v) {
+  if (g.node(v).dummy) {
+    return find$1(g.predecessors(v), function(u) {
+      return g.node(u).dummy;
+    });
+  }
+}
+function addConflict(conflicts, v, w) {
+  if (v > w) {
+    var tmp = v;
+    v = w;
+    w = tmp;
+  }
+  var conflictsV = conflicts[v];
+  if (!conflictsV) {
+    conflicts[v] = conflictsV = {};
+  }
+  conflictsV[w] = true;
+}
+function hasConflict(conflicts, v, w) {
+  if (v > w) {
+    var tmp = v;
+    v = w;
+    w = tmp;
+  }
+  return has(conflicts[v], w);
+}
+function verticalAlignment(g, layering, conflicts, neighborFn) {
+  var root2 = {}, align = {}, pos = {};
+  forEach(layering, function(layer) {
+    forEach(layer, function(v, order2) {
+      root2[v] = v;
+      align[v] = v;
+      pos[v] = order2;
+    });
+  });
+  forEach(layering, function(layer) {
+    var prevIdx = -1;
+    forEach(layer, function(v) {
+      var ws = neighborFn(v);
+      if (ws.length) {
+        ws = sortBy$1(ws, function(w2) {
+          return pos[w2];
+        });
+        var mp = (ws.length - 1) / 2;
+        for (var i = Math.floor(mp), il = Math.ceil(mp); i <= il; ++i) {
+          var w = ws[i];
+          if (align[v] === v && prevIdx < pos[w] && !hasConflict(conflicts, v, w)) {
+            align[w] = v;
+            align[v] = root2[v] = root2[w];
+            prevIdx = pos[w];
+          }
+        }
+      }
+    });
+  });
+  return { root: root2, align };
+}
+function horizontalCompaction(g, layering, root2, align, reverseSep) {
+  var xs = {}, blockG = buildBlockGraph(g, layering, root2, reverseSep), borderType = reverseSep ? "borderLeft" : "borderRight";
+  function iterate(setXsFunc, nextNodesFunc) {
+    var stack = blockG.nodes();
+    var elem = stack.pop();
+    var visited = {};
+    while (elem) {
+      if (visited[elem]) {
+        setXsFunc(elem);
+      } else {
+        visited[elem] = true;
+        stack.push(elem);
+        stack = stack.concat(nextNodesFunc(elem));
+      }
+      elem = stack.pop();
+    }
+  }
+  function pass1(elem) {
+    xs[elem] = blockG.inEdges(elem).reduce(function(acc, e) {
+      return Math.max(acc, xs[e.v] + blockG.edge(e));
+    }, 0);
+  }
+  function pass2(elem) {
+    var min2 = blockG.outEdges(elem).reduce(function(acc, e) {
+      return Math.min(acc, xs[e.w] - blockG.edge(e));
+    }, Number.POSITIVE_INFINITY);
+    var node = g.node(elem);
+    if (min2 !== Number.POSITIVE_INFINITY && node.borderType !== borderType) {
+      xs[elem] = Math.max(xs[elem], min2);
+    }
+  }
+  iterate(pass1, blockG.predecessors.bind(blockG));
+  iterate(pass2, blockG.successors.bind(blockG));
+  forEach(align, function(v) {
+    xs[v] = xs[root2[v]];
+  });
+  return xs;
+}
+function buildBlockGraph(g, layering, root2, reverseSep) {
+  var blockGraph = new Graph(), graphLabel = g.graph(), sepFn = sep(graphLabel.nodesep, graphLabel.edgesep, reverseSep);
+  forEach(layering, function(layer) {
+    var u;
+    forEach(layer, function(v) {
+      var vRoot = root2[v];
+      blockGraph.setNode(vRoot);
+      if (u) {
+        var uRoot = root2[u], prevMax = blockGraph.edge(uRoot, vRoot);
+        blockGraph.setEdge(uRoot, vRoot, Math.max(sepFn(g, v, u), prevMax || 0));
+      }
+      u = v;
+    });
+  });
+  return blockGraph;
+}
+function findSmallestWidthAlignment(g, xss) {
+  return minBy(values(xss), function(xs) {
+    var max2 = Number.NEGATIVE_INFINITY;
+    var min2 = Number.POSITIVE_INFINITY;
+    forIn(xs, function(x, v) {
+      var halfWidth = width(g, v) / 2;
+      max2 = Math.max(x + halfWidth, max2);
+      min2 = Math.min(x - halfWidth, min2);
+    });
+    return max2 - min2;
+  });
+}
+function alignCoordinates(xss, alignTo) {
+  var alignToVals = values(alignTo), alignToMin = min(alignToVals), alignToMax = max(alignToVals);
+  forEach(["u", "d"], function(vert) {
+    forEach(["l", "r"], function(horiz) {
+      var alignment = vert + horiz, xs = xss[alignment], delta;
+      if (xs === alignTo)
+        return;
+      var xsVals = values(xs);
+      delta = horiz === "l" ? alignToMin - min(xsVals) : alignToMax - max(xsVals);
+      if (delta) {
+        xss[alignment] = mapValues(xs, function(x) {
+          return x + delta;
+        });
+      }
+    });
+  });
+}
+function balance(xss, align) {
+  return mapValues(xss.ul, function(ignore, v) {
+    if (align) {
+      return xss[align.toLowerCase()][v];
+    } else {
+      var xs = sortBy$1(map(xss, v));
+      return (xs[1] + xs[2]) / 2;
+    }
+  });
+}
+function positionX(g) {
+  var layering = buildLayerMatrix(g);
+  var conflicts = merge(findType1Conflicts(g, layering), findType2Conflicts(g, layering));
+  var xss = {};
+  var adjustedLayering;
+  forEach(["u", "d"], function(vert) {
+    adjustedLayering = vert === "u" ? layering : values(layering).reverse();
+    forEach(["l", "r"], function(horiz) {
+      if (horiz === "r") {
+        adjustedLayering = map(adjustedLayering, function(inner) {
+          return values(inner).reverse();
+        });
+      }
+      var neighborFn = (vert === "u" ? g.predecessors : g.successors).bind(g);
+      var align = verticalAlignment(g, adjustedLayering, conflicts, neighborFn);
+      var xs = horizontalCompaction(g, adjustedLayering, align.root, align.align, horiz === "r");
+      if (horiz === "r") {
+        xs = mapValues(xs, function(x) {
+          return -x;
+        });
+      }
+      xss[vert + horiz] = xs;
+    });
+  });
+  var smallestWidth = findSmallestWidthAlignment(g, xss);
+  alignCoordinates(xss, smallestWidth);
+  return balance(xss, g.graph().align);
+}
+function sep(nodeSep, edgeSep, reverseSep) {
+  return function(g, v, w) {
+    var vLabel = g.node(v);
+    var wLabel = g.node(w);
+    var sum = 0;
+    var delta;
+    sum += vLabel.width / 2;
+    if (has(vLabel, "labelpos")) {
+      switch (vLabel.labelpos.toLowerCase()) {
+        case "l":
+          delta = -vLabel.width / 2;
+          break;
+        case "r":
+          delta = vLabel.width / 2;
+          break;
+      }
+    }
+    if (delta) {
+      sum += reverseSep ? delta : -delta;
+    }
+    delta = 0;
+    sum += (vLabel.dummy ? edgeSep : nodeSep) / 2;
+    sum += (wLabel.dummy ? edgeSep : nodeSep) / 2;
+    sum += wLabel.width / 2;
+    if (has(wLabel, "labelpos")) {
+      switch (wLabel.labelpos.toLowerCase()) {
+        case "l":
+          delta = wLabel.width / 2;
+          break;
+        case "r":
+          delta = -wLabel.width / 2;
+          break;
+      }
+    }
+    if (delta) {
+      sum += reverseSep ? delta : -delta;
+    }
+    delta = 0;
+    return sum;
+  };
+}
+function width(g, v) {
+  return g.node(v).width;
+}
+function position(g) {
+  g = asNonCompoundGraph(g);
+  positionY(g);
+  forOwn(positionX(g), function(x, v) {
+    g.node(v).x = x;
+  });
+}
+function positionY(g) {
+  var layering = buildLayerMatrix(g);
+  var rankSep = g.graph().ranksep;
+  var prevY = 0;
+  forEach(layering, function(layer) {
+    var maxHeight = max(
+      map(layer, function(v) {
+        return g.node(v).height;
+      })
+    );
+    forEach(layer, function(v) {
+      g.node(v).y = prevY + maxHeight / 2;
+    });
+    prevY += maxHeight + rankSep;
+  });
+}
+function layout(g, opts) {
+  var time$1 = opts && opts.debugTiming ? time : notime;
+  time$1("layout", function() {
+    var layoutGraph = time$1("  buildLayoutGraph", function() {
+      return buildLayoutGraph(g);
+    });
+    time$1("  runLayout", function() {
+      runLayout(layoutGraph, time$1);
+    });
+    time$1("  updateInputGraph", function() {
+      updateInputGraph(g, layoutGraph);
+    });
+  });
+}
+function runLayout(g, time2) {
+  time2("    makeSpaceForEdgeLabels", function() {
+    makeSpaceForEdgeLabels(g);
+  });
+  time2("    removeSelfEdges", function() {
+    removeSelfEdges(g);
+  });
+  time2("    acyclic", function() {
+    run$2(g);
+  });
+  time2("    nestingGraph.run", function() {
+    run(g);
+  });
+  time2("    rank", function() {
+    rank(asNonCompoundGraph(g));
+  });
+  time2("    injectEdgeLabelProxies", function() {
+    injectEdgeLabelProxies(g);
+  });
+  time2("    removeEmptyRanks", function() {
+    removeEmptyRanks(g);
+  });
+  time2("    nestingGraph.cleanup", function() {
+    cleanup(g);
+  });
+  time2("    normalizeRanks", function() {
+    normalizeRanks(g);
+  });
+  time2("    assignRankMinMax", function() {
+    assignRankMinMax(g);
+  });
+  time2("    removeEdgeLabelProxies", function() {
+    removeEdgeLabelProxies(g);
+  });
+  time2("    normalize.run", function() {
+    run$1(g);
+  });
+  time2("    parentDummyChains", function() {
+    parentDummyChains(g);
+  });
+  time2("    addBorderSegments", function() {
+    addBorderSegments(g);
+  });
+  time2("    order", function() {
+    order(g);
+  });
+  time2("    insertSelfEdges", function() {
+    insertSelfEdges(g);
+  });
+  time2("    adjustCoordinateSystem", function() {
+    adjust(g);
+  });
+  time2("    position", function() {
+    position(g);
+  });
+  time2("    positionSelfEdges", function() {
+    positionSelfEdges(g);
+  });
+  time2("    removeBorderNodes", function() {
+    removeBorderNodes(g);
+  });
+  time2("    normalize.undo", function() {
+    undo(g);
+  });
+  time2("    fixupEdgeLabelCoords", function() {
+    fixupEdgeLabelCoords(g);
+  });
+  time2("    undoCoordinateSystem", function() {
+    undo$1(g);
+  });
+  time2("    translateGraph", function() {
+    translateGraph(g);
+  });
+  time2("    assignNodeIntersects", function() {
+    assignNodeIntersects(g);
+  });
+  time2("    reversePoints", function() {
+    reversePointsForReversedEdges(g);
+  });
+  time2("    acyclic.undo", function() {
+    undo$2(g);
+  });
+}
+function updateInputGraph(inputGraph, layoutGraph) {
+  forEach(inputGraph.nodes(), function(v) {
+    var inputLabel = inputGraph.node(v);
+    var layoutLabel = layoutGraph.node(v);
+    if (inputLabel) {
+      inputLabel.x = layoutLabel.x;
+      inputLabel.y = layoutLabel.y;
+      if (layoutGraph.children(v).length) {
+        inputLabel.width = layoutLabel.width;
+        inputLabel.height = layoutLabel.height;
+      }
+    }
+  });
+  forEach(inputGraph.edges(), function(e) {
+    var inputLabel = inputGraph.edge(e);
+    var layoutLabel = layoutGraph.edge(e);
+    inputLabel.points = layoutLabel.points;
+    if (has(layoutLabel, "x")) {
+      inputLabel.x = layoutLabel.x;
+      inputLabel.y = layoutLabel.y;
+    }
+  });
+  inputGraph.graph().width = layoutGraph.graph().width;
+  inputGraph.graph().height = layoutGraph.graph().height;
+}
+var graphNumAttrs = ["nodesep", "edgesep", "ranksep", "marginx", "marginy"];
+var graphDefaults = { ranksep: 50, edgesep: 20, nodesep: 50, rankdir: "tb" };
+var graphAttrs = ["acyclicer", "ranker", "rankdir", "align"];
+var nodeNumAttrs = ["width", "height"];
+var nodeDefaults = { width: 0, height: 0 };
+var edgeNumAttrs = ["minlen", "weight", "width", "height", "labeloffset"];
+var edgeDefaults = {
+  minlen: 1,
+  weight: 1,
+  width: 0,
+  height: 0,
+  labeloffset: 10,
+  labelpos: "r"
+};
+var edgeAttrs = ["labelpos"];
+function buildLayoutGraph(inputGraph) {
+  var g = new Graph({ multigraph: true, compound: true });
+  var graph = canonicalize(inputGraph.graph());
+  g.setGraph(
+    merge({}, graphDefaults, selectNumberAttrs(graph, graphNumAttrs), pick$1(graph, graphAttrs))
+  );
+  forEach(inputGraph.nodes(), function(v) {
+    var node = canonicalize(inputGraph.node(v));
+    g.setNode(v, defaults$1(selectNumberAttrs(node, nodeNumAttrs), nodeDefaults));
+    g.setParent(v, inputGraph.parent(v));
+  });
+  forEach(inputGraph.edges(), function(e) {
+    var edge = canonicalize(inputGraph.edge(e));
+    g.setEdge(
+      e,
+      merge({}, edgeDefaults, selectNumberAttrs(edge, edgeNumAttrs), pick$1(edge, edgeAttrs))
+    );
+  });
+  return g;
+}
+function makeSpaceForEdgeLabels(g) {
+  var graph = g.graph();
+  graph.ranksep /= 2;
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    edge.minlen *= 2;
+    if (edge.labelpos.toLowerCase() !== "c") {
+      if (graph.rankdir === "TB" || graph.rankdir === "BT") {
+        edge.width += edge.labeloffset;
+      } else {
+        edge.height += edge.labeloffset;
+      }
+    }
+  });
+}
+function injectEdgeLabelProxies(g) {
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (edge.width && edge.height) {
+      var v = g.node(e.v);
+      var w = g.node(e.w);
+      var label = { rank: (w.rank - v.rank) / 2 + v.rank, e };
+      addDummyNode(g, "edge-proxy", label, "_ep");
+    }
+  });
+}
+function assignRankMinMax(g) {
+  var maxRank2 = 0;
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (node.borderTop) {
+      node.minRank = g.node(node.borderTop).rank;
+      node.maxRank = g.node(node.borderBottom).rank;
+      maxRank2 = max(maxRank2, node.maxRank);
+    }
+  });
+  g.graph().maxRank = maxRank2;
+}
+function removeEdgeLabelProxies(g) {
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (node.dummy === "edge-proxy") {
+      g.edge(node.e).labelRank = node.rank;
+      g.removeNode(v);
+    }
+  });
+}
+function translateGraph(g) {
+  var minX = Number.POSITIVE_INFINITY;
+  var maxX = 0;
+  var minY = Number.POSITIVE_INFINITY;
+  var maxY = 0;
+  var graphLabel = g.graph();
+  var marginX = graphLabel.marginx || 0;
+  var marginY = graphLabel.marginy || 0;
+  function getExtremes(attrs) {
+    var x = attrs.x;
+    var y = attrs.y;
+    var w = attrs.width;
+    var h = attrs.height;
+    minX = Math.min(minX, x - w / 2);
+    maxX = Math.max(maxX, x + w / 2);
+    minY = Math.min(minY, y - h / 2);
+    maxY = Math.max(maxY, y + h / 2);
+  }
+  forEach(g.nodes(), function(v) {
+    getExtremes(g.node(v));
+  });
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (has(edge, "x")) {
+      getExtremes(edge);
+    }
+  });
+  minX -= marginX;
+  minY -= marginY;
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v);
+    node.x -= minX;
+    node.y -= minY;
+  });
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    forEach(edge.points, function(p) {
+      p.x -= minX;
+      p.y -= minY;
+    });
+    if (has(edge, "x")) {
+      edge.x -= minX;
+    }
+    if (has(edge, "y")) {
+      edge.y -= minY;
+    }
+  });
+  graphLabel.width = maxX - minX + marginX;
+  graphLabel.height = maxY - minY + marginY;
+}
+function assignNodeIntersects(g) {
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    var nodeV = g.node(e.v);
+    var nodeW = g.node(e.w);
+    var p1, p2;
+    if (!edge.points) {
+      edge.points = [];
+      p1 = nodeW;
+      p2 = nodeV;
+    } else {
+      p1 = edge.points[0];
+      p2 = edge.points[edge.points.length - 1];
+    }
+    edge.points.unshift(intersectRect(nodeV, p1));
+    edge.points.push(intersectRect(nodeW, p2));
+  });
+}
+function fixupEdgeLabelCoords(g) {
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (has(edge, "x")) {
+      if (edge.labelpos === "l" || edge.labelpos === "r") {
+        edge.width -= edge.labeloffset;
+      }
+      switch (edge.labelpos) {
+        case "l":
+          edge.x -= edge.width / 2 + edge.labeloffset;
+          break;
+        case "r":
+          edge.x += edge.width / 2 + edge.labeloffset;
+          break;
+      }
+    }
+  });
+}
+function reversePointsForReversedEdges(g) {
+  forEach(g.edges(), function(e) {
+    var edge = g.edge(e);
+    if (edge.reversed) {
+      edge.points.reverse();
+    }
+  });
+}
+function removeBorderNodes(g) {
+  forEach(g.nodes(), function(v) {
+    if (g.children(v).length) {
+      var node = g.node(v);
+      var t = g.node(node.borderTop);
+      var b = g.node(node.borderBottom);
+      var l = g.node(last(node.borderLeft));
+      var r = g.node(last(node.borderRight));
+      node.width = Math.abs(r.x - l.x);
+      node.height = Math.abs(b.y - t.y);
+      node.x = l.x + node.width / 2;
+      node.y = t.y + node.height / 2;
+    }
+  });
+  forEach(g.nodes(), function(v) {
+    if (g.node(v).dummy === "border") {
+      g.removeNode(v);
+    }
+  });
+}
+function removeSelfEdges(g) {
+  forEach(g.edges(), function(e) {
+    if (e.v === e.w) {
+      var node = g.node(e.v);
+      if (!node.selfEdges) {
+        node.selfEdges = [];
+      }
+      node.selfEdges.push({ e, label: g.edge(e) });
+      g.removeEdge(e);
+    }
+  });
+}
+function insertSelfEdges(g) {
+  var layers = buildLayerMatrix(g);
+  forEach(layers, function(layer) {
+    var orderShift = 0;
+    forEach(layer, function(v, i) {
+      var node = g.node(v);
+      node.order = i + orderShift;
+      forEach(node.selfEdges, function(selfEdge) {
+        addDummyNode(
+          g,
+          "selfedge",
+          {
+            width: selfEdge.label.width,
+            height: selfEdge.label.height,
+            rank: node.rank,
+            order: i + ++orderShift,
+            e: selfEdge.e,
+            label: selfEdge.label
+          },
+          "_se"
+        );
+      });
+      delete node.selfEdges;
+    });
+  });
+}
+function positionSelfEdges(g) {
+  forEach(g.nodes(), function(v) {
+    var node = g.node(v);
+    if (node.dummy === "selfedge") {
+      var selfNode = g.node(node.e.v);
+      var x = selfNode.x + selfNode.width / 2;
+      var y = selfNode.y;
+      var dx = node.x - x;
+      var dy = selfNode.height / 2;
+      g.setEdge(node.e, node.label);
+      g.removeNode(v);
+      node.label.points = [
+        { x: x + 2 * dx / 3, y: y - dy },
+        { x: x + 5 * dx / 6, y: y - dy },
+        { x: x + dx, y },
+        { x: x + 5 * dx / 6, y: y + dy },
+        { x: x + 2 * dx / 3, y: y + dy }
+      ];
+      node.label.x = node.x;
+      node.label.y = node.y;
+    }
+  });
+}
+function selectNumberAttrs(obj, attrs) {
+  return mapValues(pick$1(obj, attrs), Number);
+}
+function canonicalize(attrs) {
+  var newAttrs = {};
+  forEach(attrs, function(v, k) {
+    newAttrs[k.toLowerCase()] = v;
+  });
+  return newAttrs;
+}
+export {
+  defaults$1 as d,
+  layout as l,
+  map as m,
+  pick$1 as p,
+  range$1 as r,
+  uniqueId as u
+};