--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/core/selection-node.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,9 @@
+d3_selectionPrototype.node = function(callback) {
+  for (var j = 0, m = this.length; j < m; j++) {
+    for (var group = this[j], i = 0, n = group.length; i < n; i++) {
+      var node = group[i];
+      if (node) return node;
+    }
+  }
+  return null;
+};