export declare class ThrottleManager {
    private throttle;
    private isSleeping;
    private sleepPromiseResolve;
    private innerPromiseResolve;
    private sleepTimeout;
    constructor(initialThrottle?: number);
    getThrottle(): number;
    setThrottle(delayInMillis: number): void;
    isPaused(): boolean;
    /**
     * An adjustable throttle that will interrupt a sleeping
     * router if the throttle is reduced and the sleep time
     * has elapsed. If the throttle is increased, or if
     * the sleep time has not elapsed, the router will continue
     * to sleep until the new termination point. This
     * allows for dynamic, elastic throttling with smooth
     * acceleration and deceleration.
     */
    customSleep(): Promise<void>;
    cancelThrottle(): void;
    private resetThrottleState;
}