{"ast_node_type":"variable","tokens":[{"end":80,"kind":"keyword","start":0,"text":"let"}]}
            let adt_def_id = tcx.hir_get_parent_item(hir_id).def_id.to_def_id();
            assert_matches!(data.ctor(), Some(_));
            let ty = tcx.type_of(adt_def_id).instantiate_identity();