docs: def get_stops_line(self, **kwargs):
          """Obtain information on the stops of the given lines.
  
          Arguments:
              lines (list[int] | int): Lines to query, may be empty to get
                  all the lines.
              direction (str): Optional, either *forward* or *backward*.
              lang (str): Language code (*es* or *en*).
  
          Returns:
              Status boolean and parsed response (list[Stop]), or message string
              in case of error.
          """
          # Endpoint parameters
          params = {
              'line': util.ints_to_string(kwargs.get('lines', [])),
              'direction': util.direction_code(kwargs.get('direction', '')),
              'cultureInfo': util.language_code(kwargs.get('lang'))
          }
  
          # Request
          result = self.make_request('geo', 'get_stops_line', **params)
  
          # Funny endpoint, no status code
          # Only interested in 'stop'
          if not util.check_result(result, 'stop'):
              return False, 'UNKNOWN ERROR'
  
          # Parse
          values = util.response_list(result, 'stop')
          return True, [emtype.Stop(**a) for a in values]