export declare namespace Touch {
    const None: 0;
    const First: 1;
    const Last: 2;
}
export declare type Touch = 0 | 1 | 2;
export declare class LinkedMap<K, V> {
    private _map;
    private _head;
    private _tail;
    private _size;
    constructor();
    clear(): void;
    isEmpty(): boolean;
    readonly size: number;
    has(key: K): boolean;
    get(key: K): V | undefined;
    set(key: K, value: V, touch?: Touch): void;
    delete(key: K): boolean;
    shift(): V | undefined;
    forEach(callbackfn: (value: V, key: K, map: LinkedMap<K, V>) => void, thisArg?: any): void;
    forEachReverse(callbackfn: (value: V, key: K, map: LinkedMap<K, V>) => void, thisArg?: any): void;
    values(): V[];
    keys(): K[];
    private addItemFirst;
    private addItemLast;
    private removeItem;
    private touch;
}