{"ast_node_type":"variable","tokens":[{"end":21,"kind":"keyword","start":0,"text":"let"}]}
        let is_1zst =
        let field_ty = tcx.type_of(field.did).instantiate_identity();
            tcx.layout_of(typing_env.as_query_input(field_ty)).is_ok_and(|layout| layout.is_1zst());