docs: def set_uri(self, uri, size, checksum, readable=True, writable=False,
                  storage_class=None):
          """Set a location of a file."""
          self.uri = uri
          self.size = size
          self.checksum = checksum
          self.writable = writable
          self.readable = readable
          self.storage_class = \
              current_app.config['FILES_REST_DEFAULT_STORAGE_CLASS'] \
              if storage_class is None else \
              storage_class
          return self