{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
        let existing_bound_vars_saved = existing_bound_vars.clone();
        let existing_bound_vars = self.rbv.late_bound_vars.get_mut(&hir_id.local_id).unwrap();
        existing_bound_vars.extend(bound_vars);