export interface IOptions {
    ttlMs?: number;
}
export type Cached<K extends string> = {
    invalidate: (key: K) => void;
};
export declare function withMemoryCache<Fn extends (...args: any[]) => Promise<Return>, Key extends string, Return>(originalFunction: Fn, keyGetter: (...args: Parameters<Fn>) => Key, options?: IOptions): Fn & Cached<Key>;