{"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
        let old_parent = self.resolver.invocation_parents.insert(id, self.invocation_parent);
        let id = id.placeholder_to_expn_id();
        assert!(old_parent.is_none(), "parent `LocalDefId` is reset for an invocation");