{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"let"}]}
        let parent_id = parent_id.map_or(CRATE_OWNER_ID, |local_def_index| {
        let parent_id = self.tcx.hir_def_key(self.current_id.owner.def_id).parent;
            let def_id = LocalDefId { local_def_index };