Index: node_modules/d3-hierarchy/src/array.js
===================================================================
--- node_modules/d3-hierarchy/src/array.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-hierarchy/src/array.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,20 @@
+export default function(x) {
+  return typeof x === "object" && "length" in x
+    ? x // Array, TypedArray, NodeList, array-like
+    : Array.from(x); // Map, Set, iterable, string, or anything else
+}
+
+export function shuffle(array, random) {
+  let m = array.length,
+      t,
+      i;
+
+  while (m) {
+    i = random() * m-- | 0;
+    t = array[m];
+    array[m] = array[i];
+    array[i] = t;
+  }
+
+  return array;
+}