diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/src/core/functor.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/core/functor.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,3 @@
+d3.functor = function(v) {
+  return typeof v === "function" ? v : function() { return v; };
+};