code: public static void assertResponseNotReceived(int statusCode, String method, long sequenceNumber,
        MessageListener obj) {
      assertResponseNotReceived(null, statusCode, method, sequenceNumber, obj);
    }
docs: Asserts that the given message listener object has not received a response with the indicated
  status code, CSeq method and sequence number.
  
  @param statusCode The response status code to verify absent (eg, SipResponse.RINGING)
  @param method The CSeq method to verify absent (SipRequest.INVITE, etc.)
  @param sequenceNumber The CSeq sequence number to verify absent
  @param obj The MessageListener object (ie, SipCall, Subscription, etc.).