/**
 * Sets CSS rules for the scroll padlock.
 * @param options - The options for the scroll padlock.
 * @param options.selector - A CSS selector string to identify the element.
 * @param options.element - The DOM element to apply the padlock to.
 * @param options.formatter - A function to format the computed layout properties.
 * @returns The style element containing the CSS rules.
 */
export declare function setStyle(options?: {
    selector?: string;
    element?: Element | HTMLElement;
    formatter?: (opts: {
        offsetWidth?: number;
        offsetHeight?: number;
        clientWidth?: number;
        clientHeight?: number;
        scrollWidth?: number;
        scrollHeight?: number;
        scrollTop?: number;
        scrollLeft?: number;
    }) => string;
}): HTMLStyleElement;