code: def load(self, callback):
          
          if callback is None:
              def callb():
                  """No-op"""
                  pass
              callback = callb
          if len(self._loaded_callbacks) == 0:
              self._request_module_status()
              self._request_channel_name()
          else:
              print("++++++++++++++++++++++++++++++++++")
          self._loaded_callbacks.append(callback)
          self._load()
docs: Retrieve names of channels