code: public void open(AVIMClientOpenOption option, final AVIMClientCallback callback) {
      boolean reConnect = null == option? false : option.isReconnect();
      OperationTube operationTube = InternalConfiguration.getOperationTube();
      operationTube.openClient(clientId, tag, userSessionToken, reConnect, callback);
    }
docs: Open Client with options.
  
  @param option
  @param callback