diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/examples/bundle/packages.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/examples/bundle/packages.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,49 @@
+(function() {
+  packages = {
+
+    // Lazily construct the package hierarchy from class names.
+    root: function(classes) {
+      var map = {};
+
+      function find(name, data) {
+        var node = map[name], i;
+        if (!node) {
+          node = map[name] = data || {name: name, children: []};
+          if (name.length) {
+            node.parent = find(name.substring(0, i = name.lastIndexOf(".")));
+            node.parent.children.push(node);
+            node.key = name.substring(i + 1);
+          }
+        }
+        return node;
+      }
+
+      classes.forEach(function(d) {
+        find(d.name, d);
+      });
+
+      return map[""];
+    },
+
+    // Return a list of imports for the given array of nodes.
+    imports: function(nodes) {
+      var map = {},
+          imports = [];
+
+      // Compute a map from name to node.
+      nodes.forEach(function(d) {
+        map[d.name] = d;
+      });
+
+      // For each import, construct a link from the source to target node.
+      nodes.forEach(function(d) {
+        if (d.imports) d.imports.forEach(function(i) {
+          imports.push({source: map[d.name], target: map[i]});
+        });
+      });
+
+      return imports;
+    }
+
+  };
+})();