//#region ../../node_modules/mdast-util-to-markdown/lib/util/check-rule.js
function e(e) {
	let t = e.options.rule || "*";
	if (t !== "*" && t !== "-" && t !== "_") throw Error("Cannot serialize rules with `" + t + "` for `options.rule`, expected `*`, `-`, or `_`");
	return t;
}
//#endregion
export { e as checkRule };
