import * as util from 'util';
export declare const r2gSmokeTest: () => boolean;
export interface LinkedQueueValue<V, K> {
    after?: LinkedQueueValue<V, K>;
    before?: LinkedQueueValue<V, K>;
    value: V;
    key: any;
}
export type IteratorFunction<T, V> = (val: [T, V], index: number) => V;
declare const IsVoidVal: unique symbol;
export declare const IsVoid: {
    check: (v: any) => boolean;
};
export declare class LinkedQueue<V, K = any> {
    private lookup;
    private head;
    private tail;
    static IsVoid(v: any): boolean;
    checkIfVoid(v: any): boolean;
    getComputedProperties(): {
        size: number;
    };
    toJSON(): {
        size: number;
    };
    [util.inspect.custom](): {
        size: number;
    };
    get size(): number;
    get length(): number;
    getLength(): number;
    getSize(): number;
    iterator(): this;
    getIterator(): this;
    [Symbol.iterator](): Iterator<[K, V]>;
    reverseIterator(): {
        [Symbol.iterator]: () => Iterator<[K, V]>;
    };
    private processItem;
    asyncIterator(): AsyncGenerator<[K, V], void, unknown>;
    asyncReverseIterator(): AsyncGenerator<[K, V], void, unknown>;
    dequeueIterator(): {
        [Symbol.iterator](): Iterator<[K, V]>;
    };
    getRandomKey(): K;
    getRandomItem(): [K, V] | [typeof IsVoidVal];
    remove(k: K): [K, V] | [typeof IsVoidVal];
    contains(k: K): boolean;
    get(k: K): ([K, V] | [typeof IsVoidVal]);
    peek(): [K, V] | [typeof IsVoidVal];
    getOrderedList(): Array<[K, V]>;
    map(fn: IteratorFunction<V, any>, ctx?: any): Array<any>;
    filter(fn: IteratorFunction<V, boolean>, ctx?: any): [K, V][];
    insertInFrontOf(): void;
    insertBehind(): void;
    insertAtIndex(k: K, v: V): void;
    first(): ([K, V] | [typeof IsVoidVal]);
    last(): ([K, V] | [typeof IsVoidVal]);
    getReverseOrderedList(): [K, V][];
    removeAll(): void;
    clear(): void;
    push(k?: any, val?: any): void;
    addToFront(k: K, obj?: V): void;
    enq(k?: any, val?: any): void;
    enqueue(k: any, val?: any): void;
    forEach(fn: IteratorFunction<V, void>, ctx?: any): this;
    dequeueEach(fn: IteratorFunction<V, void>, ctx?: any): this;
    deq(n?: number): [K, V] | [typeof IsVoidVal] | LinkedQueueValue<V, K>[];
    dequeue(): [K, V] | [typeof IsVoidVal];
    shift(): [K, V] | [typeof IsVoidVal];
    unshift(k: K, obj?: V): void;
    pop(): ([K, V] | [typeof IsVoidVal]);
    removeLast(): ([K, V] | [typeof IsVoidVal]);
}
export {};