{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
// into specializations this way, given how `CacheDecoder` and the decoding traits currently work.
// when a `CacheDecoder` is passed to `Decodable::decode`. Unfortunately, we have to manually opt
impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for Vec<u8> {