find out if object is an external => prints EFL error, but seems to work until my application finds a better way to find out

edjexx/include/edjexx/Part.h

@@ -43,6 +43,8 @@ public:
    */
   Evasxx::Object &getSwallow ();
 
+  bool isExternalObject ();
+  
   /*!
    * @throw ExternalNotExistingException
    */

edjexx/src/Part.cpp

@@ -78,6 +78,11 @@ Evasxx::Object &Part::getSwallow()
   return *mSwallowObject;
 }
 
+bool Part::isExternalObject ()
+{
+  return edje_object_part_external_object_get (mParent->obj(), mPartname.c_str ());
+}
+
 Evasxx::Object &Part::getExternalObject ()
 {
   Evas_Object *eo = edje_object_part_external_object_get (mParent->obj(), mPartname.c_str ());