/**
 * Queue Item
 */
export declare type TQueueItemType = {
    /**
     * Id of the item
     */
    id?: string;
};
/**
 * Queue implementation
 *
 * @template T
 */
declare class Queue<T extends TQueueItemType> {
    items: Record<number, T>;
    head: number;
    tail: number;
    /**
     * Constructor
     *
     * @param {T[]} items default items to the queue
     */
    constructor(items?: T[]);
    /**
     * Clears the queue
     */
    clear(): void;
    /**
     * Check if the item exists in the queue
     *
     * @param {T} item check if item already exists in the queue
     * @returns {boolean} true if item exists
     */
    has(item: T): boolean;
    /**
     * Adds item to queue
     *
     * @param {T} item item
     */
    enqueue(item: T): void;
    /**
     * returns item from the queue
     *
     * @returns {T} item
     */
    dequeue(): T;
    /**
     * Peaks into the head of the queue
     *
     * @returns {T} item
     */
    peek(): T;
    /**
     * Length of the queue
     *
     * @returns {number} length of the queue
     */
    get length(): number;
    /**
     * Check if the queue is empty
     *
     * @returns {boolean} is empty
     */
    get isEmpty(): boolean;
}
export default Queue;