{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":".with_type_param_mode(ParamLoweringMode::Variable);"}]}
            .with_type_param_mode(ParamLoweringMode::Variable);
            .with_impl_trait_mode(ImplTraitLoweringMode::Opaque)
            ctx_ret.lower_ty(ret_type)