code: def make_middleware(cls, app, **options):
          
          from depot.middleware import DepotMiddleware
          mw = DepotMiddleware(app, **options)
          cls.set_middleware(mw)
          return mw
docs: Creates the application WSGI middleware in charge of serving local files.
  
          A Depot middleware is required if your application wants to serve files from
          storages that don't directly provide and HTTP interface like
          :class:`depot.io.local.LocalFileStorage` and :class:`depot.io.gridfs.GridFSStorage`