import { AsyncSequence } from "../../sequency";
export declare class TakeWhile {
    /**
     * Takes all elements of the sequence as long as the given `predicate` evaluates to true.
     *
     * @param {(item: T) => Promise<boolean> | boolean} predicate
     * @returns {AsyncSequence<T>}
     */
    takeWhile<T>(this: AsyncSequence<T>, predicate: (item: T) => Promise<boolean> | boolean): AsyncSequence<T>;
}