/**
 * 更新样式表, 不存在则创建一个
 * @param {Record<string, string | number | null>} property - rules
 * @param {string} [selector = ':root'] - 更新的位置, CSS样式表选择器
 * @returns {void}
 */ export declare function updateStyleRule(property: Record<string, string | number | null>, selector: string): void;