export declare class CacheMap<K, V> extends Map<K, V> {
    private readonly queue;
    getOrQueue<F extends () => V | Promise<V>>(key: K, factory: F): Awaited<ReturnType<F>> | undefined;
    getOrCreate<F extends () => V | Promise<V>>(key: K, factory: F): Promise<Awaited<ReturnType<F>>>;
}