Get information about original function from bound function

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 9bf96081d5a4a3276bff5aa06892331055269c5b..dfc88fd291e4f533de7505c906031addad71e640 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2665,6 +2665,12 @@ class V8_EXPORT Function : public Object {
    */
   int ScriptId() const;
 
+  /**
+   * Returns the original function if this function is bound, else returns
+   * v8::Undefined.
+   */
+  Local<Value> GetBoundFunction() const;
+
   ScriptOrigin GetScriptOrigin() const;
   V8_INLINE static Function* Cast(Value* obj);
   static const int kLineOffsetNotFound;