{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"self.canonical_var_for_region(CanonicalVarKind::Region(ty::UniverseIndex::ROOT),"}]}
        self.canonical_var_for_region(CanonicalVarKind::Region(ty::UniverseIndex::ROOT), r)
    ) -> ty::Region<'tcx> {
    }