/**
 * delay something, works like setTimeout
 * @param timeInMillisecondArg
 * @param passOnArg
 */
export declare const delayFor: <T>(timeInMillisecondArg: number, passOnArg?: T, unrefedArg?: boolean) => Promise<T | undefined>;
/**
 * delay for a random time
 */
export declare const delayForRandom: <T>(timeMinInMillisecondArg: number, timeMaxInMillisecondArg: number, passOnArg?: T, unrefedArg?: boolean) => Promise<T | undefined>;
export declare class Timeout<T> {
    promise: Promise<T>;
    private _deferred;
    private _timeout;
    private _cancelled;
    private timeoutInMillis;
    private started;
    constructor(timeInMillisecondArg: number, passOn?: T, unrefedArg?: boolean);
    /**
     * unreffing a timeout causes the node process to not wait for completion before exit
     */
    makeUnrefed(): void;
    /**
     * cancels the timer
     */
    cancel(): void;
    getTimeLeft(): number;
}