code: def oem(self, command, timeout_ms=None, info_cb=DEFAULT_MESSAGE_CALLBACK):
      
      return self._simple_command(
          'oem %s' % command, timeout_ms=timeout_ms, info_cb=info_cb)
docs: Executes an OEM command on the device.
  
      Args:
        command: The command to execute, such as 'poweroff' or 'bootconfig read'.
        timeout_ms: Optional timeout in milliseconds to wait for a response.
        info_cb: See Download. Messages vary based on command.
      Returns:
        The final response from the device.