{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"GenericArg::TypeArg(arg)"}]}
            GenericArg::TypeArg(arg) if generic_arg.is_none() => {
            GenericArg::ConstArg(_) | GenericArg::LifetimeArg(_) => (),
                generic_arg = Some(arg);