fn decode_arena_allocable_slice<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>, T: ArenaAllocatable<'tcx> + Decodable<D>>(
    decoder: &mut D
) -> &'tcx [T]ⓘNotable traits for &mut [u8]impl Write for &mut [u8]impl Read for &[u8] where
    D: TyDecoder,