import { PlaybackState } from '../models/PlaybackState';
export declare class DashboardsUpdateService {
    private updateTimer;
    /**
     * Starts a timer, which will call the callback function each second.
     * @param callback The callback function to call each second.
     */
    start(callback: (...args: any[]) => void): void;
    /**
     * Stops the started timer.
     */
    stop(): void;
    getState(): PlaybackState;
}