Index: node_modules/d3-hierarchy/src/hierarchy/path.js
===================================================================
--- node_modules/d3-hierarchy/src/hierarchy/path.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-hierarchy/src/hierarchy/path.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,30 @@
+export default function(end) {
+  var start = this,
+      ancestor = leastCommonAncestor(start, end),
+      nodes = [start];
+  while (start !== ancestor) {
+    start = start.parent;
+    nodes.push(start);
+  }
+  var k = nodes.length;
+  while (end !== ancestor) {
+    nodes.splice(k, 0, end);
+    end = end.parent;
+  }
+  return nodes;
+}
+
+function leastCommonAncestor(a, b) {
+  if (a === b) return a;
+  var aNodes = a.ancestors(),
+      bNodes = b.ancestors(),
+      c = null;
+  a = aNodes.pop();
+  b = bNodes.pop();
+  while (a === b) {
+    c = a;
+    a = aNodes.pop();
+    b = bNodes.pop();
+  }
+  return c;
+}