docs: def send_config_from_file(self, config_file=None, **kwargs):
          """
          Send configuration commands down the SSH channel from a file.
  
          The file is processed line-by-line and each command is sent down the
          SSH channel.
  
          **kwargs are passed to send_config_set method.
  
          :param config_file: Path to configuration file to be sent to the device
          :type config_file: str
  
          :param kwargs: params to be sent to send_config_set method
          :type kwargs: dict
          """
          with io.open(config_file, "rt", encoding="utf-8") as cfg_file:
              return self.send_config_set(cfg_file, **kwargs)