docs: def _filter_gameplay_stats(self, data, game_mode, game_region):
          """Returns gameplay stats that are filtered by game_mode and game_region.
  
              :param data: Json of gameplay stats.
              :type data: dict
              :param game_mode: Target game mode.
              :type game_mode: str
              :param game_region: Target game region.
              :type game_region: str
              :return: return list of gameplay stats with target game mode and region.
              :rtype: list
          """
          return_data = []
          for stat in data['Stats']:
              if self._is_target_game_mode(stat, game_mode) and self._is_target_region(stat, game_region):
                  return_data.append(stat)
          return return_data