{"ast_node_type":"impl","tokens":[{"end":76,"kind":"keyword","start":0,"text":"alloc_bytes:"}]}
        alloc_bytes: impl FnOnce(&[u8], Align) -> InterpResult<'tcx, Bytes>,
        cx: &impl HasDataLayout,
        mut adjust_ptr: impl FnMut(Pointer<CtfeProvenance>) -> InterpResult<'tcx, Pointer<Prov>>,