{"ast_node_type":"function","tokens":[{"end":34,"kind":"keyword","start":0,"text":"fn"}]}
    fn decode(d: &mut D) -> Self {
impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for Term<'tcx> {
        let res: TermKind<'tcx> = Decodable::decode(d);