declare const eventually: <T, U>(assert: (result: T) => U, poll: () => Promise<T>, { retries, delay, error }?: {
    retries?: number | undefined;
    delay?: number | undefined;
    /** Error constructor based on thrown assertion error and last polled result. */
    error?: ((err: unknown, result: T) => unknown) | undefined;
}) => Promise<U>;
export default eventually;