{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
        let mut typeck_results = self.typeck_results.borrow_mut();
        let rvalue_scopes = { rvalue_scopes::resolve_rvalue_scopes(self, scope_tree, def_id) };
        typeck_results.rvalue_scopes = rvalue_scopes;