import { IInterval } from './interfaces';
/**
 * Value Object
 */
export declare class Interval implements IInterval {
    private static instance;
    static create(): Interval;
    private emitter;
    private constructor();
    private items;
    private intervalId;
    /**
     * just run with `window.setInterval`
     */
    private startTick;
    /**
     * Weather running `window.setInterval`
     */
    private isRunningTick;
    /**
     * To stop running `window.setInterval`
     */
    private stopTick;
    private hasItems;
    /**
     * whether item has
     */
    private has;
    private add;
    private remove;
    wait(item: unknown, condition: (onTick: (cb: () => void) => void) => Promise<void>): Promise<void>;
}
export default Interval;