{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"#[allow(rustc::usage_of_ty_tykind)]"}]}
    #[allow(rustc::usage_of_ty_tykind)]
impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for Ty<'tcx> {
    fn decode(decoder: &mut D) -> Ty<'tcx> {