code: @Override
      public void connect(String server, int port, Map<String, Object> connectionParams, IPendingServiceCallback connectCallback) {
          connect(server, port, connectionParams, connectCallback, null);
      }
docs: Connect RTMP client to server's application via given port
  
  @param server
  Server
  @param port
  Connection port
  @param connectionParams
  Connection parameters
  @param connectCallback
  Connection callback