import { type SortableTypes } from './array/comparators.js';
export declare class PriorityQueue<T = any> {
    #private;
    constructor(compareby?: number | symbol | string | ((a: T) => SortableTypes | undefined | null));
    enqueue(item: T): void;
    dequeue(): T | undefined;
    peek(): T | undefined;
    clear(): void;
    get size(): number;
    [Symbol.iterator](): Generator<T>;
}