{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"inner.undo_log.push(UndoLog::PushTypeOutlivesConstraint);"}]}
        inner.undo_log.push(UndoLog::PushTypeOutlivesConstraint);
        let mut inner = self.inner.borrow_mut();
        inner.region_obligations.push(obligation);