code: async function getSchedule (scheduleId) {
    if (typeof scheduleId !== 'string') {
      throw new JError.InvalidArgumentError('Invalid argument, it can only be set to the String.')
    }
    var url = SCHEDULE_API_URL + '/' + scheduleId
    return _request(this, url, null, 'GET')
  }
docs: 获取指定的定时任务。