/**
 * Use the `.add` method to add async functions to the queue
 * Await the `.complete` if you want to ensure the queue is empty at any point
 * `complete` resolves whenever no more tasks are running.
 * Important note: Currently runs tasks 1 by 1, there is no concurrency option at the moment
 */
export class AsyncQueue {
    __running: boolean;
    /** @type {function[]} */
    __queue: Function[];
    /**
     *
     * @param {function} task
     */
    add(task: Function): void;
    complete: Promise<any> | undefined;
    /** @type {function} */
    __callComplete: Function | undefined;
    /** @private */
    private __run;
}