{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"op:"}]}
                         op: &OpTy<'tcx, <M as Machine<'tcx>>::Provenance>|
        let get_bytes = |this: &InterpCx<'tcx, M>,
         -> InterpResult<'tcx, &[u8]> {