import { PromiseValue } from "../common";
export declare function takeWhile<T, R, N>(iterator: Iterator<T, R, N>, predicate: (value: T, index: number) => boolean): Generator<T, R | undefined, undefined>;
export declare function takeWhileAsync<T, R, N>(iterator: AsyncIterator<T, R, N>, predicate: (value: PromiseValue<T>, index: number) => boolean | Promise<boolean>): AsyncGenerator<PromiseValue<T>, R | undefined, undefined>;
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