code: public MessageListResult getMessageList(int count, String begin_time, String end_time)
              throws APIConnectionException, APIRequestException {
          return _messageClient.getMessageList(count, begin_time, end_time);
      }
docs: Get message list from history, messages will store 60 days.
  @param count Necessary parameter. The count of the message list.
  @param begin_time Necessary parameter. The format must follow by 'yyyy-MM-dd HH:mm:ss'
  @param end_time Necessary parameter. The format must follow by 'yyyy-MM-dd HH:mm:ss'
  @return MessageListResult
  @throws APIConnectionException connect exception
  @throws APIRequestException request exception