docs: def multipart_listparts(self, multipart):
          """Get parts of a multipart upload.
  
          :param multipart: A :class:`invenio_files_rest.models.MultipartObject`
              instance.
          :returns: A Flask response.
          """
          return self.make_response(
              data=Part.query_by_multipart(
                  multipart).order_by(Part.part_number).limit(1000).all(),
              context={
                  'class': Part,
                  'multipart': multipart,
                  'many': True,
              }
          )