{"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"//"}]}
// for some particular `D`/`S`.
// These impls are generic over `Prov` since `CtfeProvenance` is only decodable/encodable
impl<D: Decoder, Prov: Provenance + Decodable<D>> Decodable<D> for ProvenanceMap<Prov> {