/**
 * 创建一个Map，但无论传递任何键，都返回同一个元素
 */
export default class AnyKeyMap<T> implements Map<string, T> {
    private onlyElement;
    private setKeys;
    constructor(onlyElement: T);
    clear(): void;
    delete(key: string): boolean;
    forEach(callbackfn: (value: T, key: string, map: Map<string, T>) => void, thisArg?: any): void;
    get(key: string): T | undefined;
    has(key: string): boolean;
    set(key: string, value: T): this;
    get size(): number;
    entries(): MapIterator<[string, T]>;
    keys(): MapIterator<string>;
    values(): MapIterator<T>;
    [Symbol.iterator](): MapIterator<[string, T]>;
    [Symbol.toStringTag]: string;
}