{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
        let typing_env = ty::TypingEnv::non_body_analysis(tcx, field.did);
        let ty = field.ty(tcx, GenericArgs::identity_for_item(tcx, field.did));
        let layout = tcx.layout_of(typing_env.as_query_input(ty));