koishi-plugin-adapter-iirose/src/encoder/system/room/unsubscribeRoom.ts

[IIROSE-蔷薇花园](https://iirose.com/)适配器

/**
 * 取消订阅房间
 * @param roomId 房间ID
 * @returns {string}
 */
export default (roomId: string): string =>
{
  return `=^v$0${roomId}`;
};