export interface IExpiringMap<K, V> extends Map<K, V> {
    destroy: () => void;
    on(event: "timeout", listener: (key: K, val?: V) => void): void;
    on(event: "delete", listener: (key: K) => void): void;
    on(event: string | symbol, listener: (...args: any[]) => void): void;
    once(event: string | symbol, listener: (...args: any[]) => void): void;
    removeListener(event: string | symbol, listener: (...args: any[]) => void): void;
}
export declare namespace NExpiringMap {
    type Options = {
        valueTimeout?: number;
        interval?: number;
        updateTimeOnGet?: boolean;
    };
}