def test_supervised_methods_volume_gateways(self):
        """Assure all these methods are supervised by timing decorator."""
        superv = [
            'get_root', 'get_user_volume', 'get_generation_delta', 'get_node',
            'get_node_by_path', 'get_all_nodes',
            'get_deleted_files', 'get_children',
            'get_child_by_name', 'get_content', 'get_uploadjob',
            'get_user_uploadjobs', 'get_user_multipart_uploadjob',
            'get_directories_with_mimetypes', 'check_has_children',
            'make_file', 'make_subdirectory', 'make_tree', 'make_share',
            'delete_node', 'restore_node', 'move_node', 'make_uploadjob',
            'make_file_with_content', 'make_content', 'delete_uploadjob',
            'add_uploadjob_part',
            'set_uploadjob_when_last_active', 'change_public_access',
            'get_node_parent_ids', 'undelete_volume',
        ]
        for methname in superv:
            meth = getattr(self.gw, methname)
            self.assertTrue(self._is_decorated(meth, timing_metric),
                            '%r is not decorated' % (methname,))