{"ast_node_type":"other","tokens":[{"end":7,"kind":"keyword","start":0,"text":")"}]}
    ) {
        opaque_ty_decls: FxIndexMap<OpaqueTypeKey<'tcx>, OpaqueHiddenType<'tcx>>,
        let mut decls_modulo_regions: FxIndexMap<OpaqueTypeKey<'tcx>, (OpaqueTypeKey<'tcx>, Span)> =