add given node graph valid add node graph assum actor us add own element model em need work em ad node own element model namespac implicitli make visibl namespac em note em method inconsist link add node allow node ad graph param node node ad graph overrid add node object node defin log lp log granular type statement lp log local start method lp log local nest ifdef usecasediagram log debug ad usecas node endif graph bit inconist add node add node node add node check actor us add model namespac node add node model facad auml element node model facad namespac node model core helper add own element home model node tell gef chang node ad node 