/**
 * <p style="text-indent: 2em;">
 * A <code>ng</code> service handles the <code>UI</code> system clock logic. The <code>UI</code> system clock is mainly responsible for periodically
 * update the system-wide clock to other components. Using clock provided by <code>this</code> service instead of using <code>setInterval()</code> or
 * <code>setTimeout()</code> method may be more benefitial in many circumstances. For example, if you have many <code>UI</code> components needed to
 * be periodically updated itself in background, without <code>this</code> service, you may need to use <code>setTimeout()</code> / <code>setInterval()</code>
 * method for each component. This leads to having poor <code>application</code>'s performance. In spite of that, you can use the <code>system clock</code>
 * provided by <code>this</code> service to let all <code>UI</code> components being updated at the same <code>clock tick</code> rate. Furthermore,
 * <code>this</code> service also provides you a capability to configure its <code>interval</code>. So, you can haste up or slow down system-wide <code>UI</code>
 * updating rate in a single place.
 * </p>
 *
 * @author shiorin, tee4cute
 */
export declare class UISystemClock {
    private currentDateTime;
    private phloxAppInfo;
    private timerInterval;
    private delayTimer;
    constructor();
    private updateTimerInterval();
    /**
     * <p style="text-indent: 1em;">
     * Get current <code>system clock</code> datetime.
     * </p>
     *
     * @return A <code>Date</code> object representing current system datetime.
     */
    getCurrentClockDateTime(): Date;
    /**
     * <p style="text-indent: 1em;">
     * Get current <code>system clock</code> time in milliseconds.
     * </p>
     *
     * @return A number representing current system datetime in milliseconds.
     */
    getCurrentClockTime(): number;
}