code: def worker_channels(self):
          
          if self._worker_channels is None:
              self._worker_channels = WorkerChannelList(
                  self._version,
                  workspace_sid=self._solution['workspace_sid'],
                  worker_sid=self._solution['sid'],
              )
          return self._worker_channels
docs: Access the worker_channels
  
          :returns: twilio.rest.taskrouter.v1.workspace.worker.worker_channel.WorkerChannelList
          :rtype: twilio.rest.taskrouter.v1.workspace.worker.worker_channel.WorkerChannelList