(self, zoom_level, tiles_to_load, max_tiles=None)
* Loads the tiles for the specified zoom_level and bounds from the web service,
          this source has been created with
        :param tiles_to_load: All tile coordinates which shall be loaded
        :param zoom_level: The zoom level which will be loaded
        :param max_tiles: The maximum number of tiles to be loaded
        :return:
* Loads the tiles for the specified zoom_level and bounds from the web service,
          this source has been created with
        :param tiles_to_load: All tile coordinates which shall be loaded
        :param zoom_level: The zoom level which will be loaded
        :param max_tiles: The maximum number of tiles to be loaded
        :return:
* Loads the tiles for the specified zoom_level and bounds from the web service this source has been created with : param tiles_to_load : All tile coordinates which shall be loaded : param zoom_level : The zoom level which will be loaded : param max_tiles : The maximum number of tiles to be loaded : return :
def load_tiles(self, zoom_level, tiles_to_load, max_tiles=None):
        """
         * Loads the tiles for the specified zoom_level and bounds from the web service,
          this source has been created with
        :param tiles_to_load: All tile coordinates which shall be loaded
        :param zoom_level: The zoom level which will be loaded
        :param max_tiles: The maximum number of tiles to be loaded
        :return:
        """
        raise NotImplementedError
def load_tiles ( self , zoom_level , tiles_to_load , max_tiles = None ) : raise NotImplementedError