export declare class Queue {
    private items;
    constructor();
    get size(): number;
    /**
     * Adds a value to the queue
     * @param val the value to add to the queue
     * @returns {number} the new size of the queue
     */
    enqueue(val: any): number;
    /**
     * removes the next item in the queue
     * @returns {any} the next item in the queue
     */
    dequeue(): any;
}