export default class ServiceWorkerHelper {
    private readonly serviceWorker;
    constructor(sw: ServiceWorker | null);
    /**
     * This method sends a message to the service worker and waits for a response.
     * It resolves when the service worker responds with a message that contains the same `messageId` as sent.
     * @param message The message to send to the service worker.
     * @returns
     */
    sendMessageToServiceWorker(message: object): Promise<void>;
}