doe cascad delet modelel associ element illeg state delet element method call directli associ end follow element ul li binari associ lose associ end delet li link end associ associ end ul param elem uml factori mdr impl delet object delet associ end object elem elem associ end illeg argument except elem elem associ end ae associ end elem uml associ assoc ae associ assoc assoc connect assoc connect size binari associ model impl uml factori delet assoc delet link end associ end model impl uml helper delet collect omg uml uml ae ref outermost common behavior associ end link end link end ae 