import { AsyncSequence } from "../../sequency";
export declare class FlatMap {
    /**
     * Transforms each element into a sequence of items and returns a flat single sequence of all those items.
     *
     * @param {(value: S) => Promise<AsyncSequence<T>> | AsyncSequence<T>} transform
     * @returns {AsyncSequence<T>}
     */
    flatMap<S, T>(this: AsyncSequence<S>, transform: (value: S) => Promise<AsyncSequence<T>> | AsyncSequence<T>): AsyncSequence<T>;
}