overrid add node relat edg object node add node relat edg node model facad classifi node collect end model facad associ end node object ae end model facad nari associ model facad associ ae add edg model facad associ ae add edg model facad associ ae model facad associ node collect end model facad connect node object associ end end add edg associ end add edg associ end model facad instanc node collect end model facad link end node object end end object link model facad link end add edg link add edg link model facad generaliz element node collect gener model facad gener node object gener gener add edg gener add edg gener collect special model facad special node object special special add edg special add edg special model facad model element node list depend arrai list model facad client depend node depend add model facad supplier depend node object depend depend add edg depend add edg depend 