docs: def get_groups(self, **kwargs):
          """Obtain line types and details.
  
          Args:
              lang (str): Language code (*es* or *en*).
  
          Returns:
              Status boolean and parsed response (list[GeoGroupItem]), or message
              string in case of error.
          """
          # Endpoint parameters
          params = {
              'cultureInfo': util.language_code(kwargs.get('lang'))
          }
  
          # Request
          result = self.make_request('geo', 'get_groups', **params)
  
          if not util.check_result(result):
              return False, result.get('resultDescription', 'UNKNOWN ERROR')
  
          # Parse
          values = util.response_list(result, 'resultValues')
          return True, [emtype.GeoGroupItem(**a) for a in values]