code: def mechanism(self, mechanism):
          
          allowed_values = ["connector", "direct"]
          if mechanism not in allowed_values:
              raise ValueError(
                  "Invalid value for `mechanism` ({0}), must be one of {1}"
                  .format(mechanism, allowed_values)
              )
  
          self._mechanism = mechanism
docs: Sets the mechanism of this DeviceData.
          The ID of the channel used to communicate with the device.
  
          :param mechanism: The mechanism of this DeviceData.
          :type: str