@Override
  public void setInvalid(Requestor requestor, String message) {
    DebuggerManagerThreadImpl.assertIsManagerThread();
    //deleteRequest(requestor);
    //myRequestorToBelongedRequests.remove(requestor); // clear any mapping to empty set if any
    if (!isVerified(requestor)) {
      myRequestWarnings.put(requestor, message);
    }
  }
@Override
  public void setInvalid(Requestor requestor, String message)