docs: def _prepare_connection(**kwargs):
      '''
      Prepare the connection with the remote network device, and clean up the key
      value pairs, removing the args used for the connection init.
      '''
      init_args = {}
      fun_kwargs = {}
      netmiko_kwargs = __salt__['config.get']('netmiko', {})
      netmiko_kwargs.update(kwargs)  # merge the CLI args with the opts/pillar
      netmiko_init_args, _, _, netmiko_defaults = inspect.getargspec(BaseConnection.__init__)
      check_self = netmiko_init_args.pop(0)
      for karg, warg in six.iteritems(netmiko_kwargs):
          if karg not in netmiko_init_args:
              if warg is not None:
                  fun_kwargs[karg] = warg
              continue
          if warg is not None:
              init_args[karg] = warg
      conn = ConnectHandler(**init_args)
      return conn, fun_kwargs