{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":".instantiate(self.tcx,"}]}
                        .instantiate(self.tcx, opaque_type_key.args);
                        .type_of_opaque_hir_typeck(opaque_type_key.def_id)
                    let actual = ty::fold_regions(tcx, actual, |re, _dbi| match re.kind() {