{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"assert!(!UndoLogs::<UndoLog<'_>>::in_snapshot(&inner.undo_log));"}]}
        assert!(!UndoLogs::<UndoLog<'_>>::in_snapshot(&inner.undo_log));
        let inner = self.inner.borrow();
        let storage = inner.region_constraint_storage.as_ref().expect("regions already resolved");