code: def r_assets(self, filetype, asset):
          
          if filetype in self.assets and asset in self.assets[filetype] and self.assets[filetype][asset]:
              return send_from_directory(
                  directory=self.assets[filetype][asset],
                  filename=asset
              )
          abort(404)
docs: Route for specific assets.
  
          :param filetype: Asset Type
          :param asset: Filename of an asset
          :return: Response