{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"impl_def.get_or_create_generic_param_list().add_generic_param("}]}
        impl_def.get_or_create_generic_param_list().add_generic_param(
            make::lifetime_param(new_lifetime_param.clone()).clone_for_update().into(),