code: def check_channel_shell_request(self, channel):
          '''Request to start a shell on the given channel'''
          try:
              self.channels[channel].start()
          except KeyError:
              log.error('Requested to start a channel (%r) that was not previously set up.', channel)
              return False
          else:
              return Truf check_channel_shell_request(self, channel):
          '''Request to start a shell on the given channel'''
          try:
              self.channels[channel].start()
          except KeyError:
              log.error('Requested to start a channel (%r) that was not previously set up.', channel)
              return False
          else:
              return True
docs: Request to start a shell on the given channel