private Set<CCFGNode> handleMethodCallNode(CCFGNode node,Stack<MethodCall> callStack,Set<CCFGNode> handled){
  CCFGMethodCallNode callNode=(CCFGMethodCallNode)node;
  updateCallStackForCallNode(callStack,callNode);
  return filterHandledMapForMethodCallNode(callNode,handled);
}

private Set < CCFGNode > handleMethodCallNode ( CCFGNode node , Stack < MethodCall > callStack , Set < CCFGNode > handled ) { CCFGMethodCallNode callNode = ( CCFGMethodCallNode ) node ; updateCallStackForCallNode ( callStack , callNode ) ; return filterHandledMapForMethodCallNode ( callNode , handled ) ; }
pushes a methodcall according to the given methodcallnode onto the callstack and filters set of handled nodes to no longer contain nodes of the called method except the method call itself . filtering the handled set is due to the fact , that we will have to visit some nodes more than once in case of a recursive method call for example
