/**
 * Subscribe to UI event.
 * @param  element - Target element.
 * @param  eventName - Event name to subscribe.
 * @param  listener - Event listener.
 * @param  useCapture - Capture phase or bubble.
 * @return Unsubscribe from event.
 */
export declare function subscribeEvent(element: HTMLElement | Document | Window, eventName: string, listener: (event?: Event) => void, useCapture?: boolean): () => void;
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