public void submitSignal(EPDataFlowSignal signal) {
   signalManager.processSignal(operatorNum, signal);
   for (SubmitHandler[] handlerArr : handlersPerStream) {
     for (SubmitHandler handler : handlerArr) {
       handler.handleSignal(signal);
     }
   }
 }
 public void submitPort(int portNumber, Object object) {
   SubmitHandler[] targets = handlersPerStream[portNumber];
   for (SubmitHandler handler : targets) {
     handler.submitInternal(object);
   }
 }