Function type checking

compiler/lib/implementation/core.js

Index: compiler/lib/implementation/core.js
diff --git a/compiler/lib/implementation/core.js b/compiler/lib/implementation/core.js
index 12456e177d59536d665a777addf1551aa8f82320..bfdc313cb8efb255cd1993a17717290b0d5e8cc1 100644
--- a/compiler/lib/implementation/core.js
+++ b/compiler/lib/implementation/core.js
@@ -156,19 +156,26 @@ function $inherits(child, parent) {
  * @param {...*} var_args
  */
 function $bind(fn, thisObj, var_args) {
+  var func;
   if (arguments.length > 2) {
     var boundArgs = Array.prototype.slice.call(arguments, 2);
-    return function() {
+    func = function() {
       // Prepend the bound arguments to the current arguments.
       var newArgs = Array.prototype.slice.call(arguments);
       Array.prototype.unshift.apply(newArgs, boundArgs);
       return fn.apply(thisObj, newArgs);
     };
   } else {
-    return function() {
+    func = function() {
       return fn.apply(thisObj, arguments);
     };
   }
+  if(fn.$lookupRTT) {
+    func.$lookupRTT = function() {
+      return fn.$lookupRTT.apply(thisObj, arguments);
+    };
+  }
+  return func;
 }
 
 /**