{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"for"}]}
    for (field_id, field_data) in fields.iter() {
    .with_type_param_mode(ParamLoweringMode::Variable);
        res.insert(field_id, make_binders(db, &generics, ctx.lower_ty(field_data.type_ref)));