/*!
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */
/**
 * When having multiple tasks that need to execute synchronously, you can use this class to have each task wait for the earlier tasks
 *
 */
export declare class RexAsyncDefferedQueue {
    private delay;
    private waiting;
    private interval;
    private _ended;
    get ended(): boolean;
    constructor(delay?: number);
    private check;
    /**
     * allow the next task to begin
     */
    next(): void;
    /**
     * the amount of promises queued up
     */
    get size(): number;
    /**
     * wait till earlier queued up tasks are done
     * @returns promise that will resolve when earlier tasks are done
     */
    wait(): Promise<void>;
    /**
     * resolves all left over waiting promises and ends auto checking
     */
    end(): Promise<void>;
    /**
     * re enable auto checking for when tasks are waiting
     */
    restart(): void;
}