/**
 * Tap allows you to listen on values, without modifying them.
 *
 * @param fn - function to call for each value.
 */
export declare function opTapAsync<T>(tapFn: (v: T) => void): (iter: AsyncIterable<T>) => AsyncIterable<T>;
/**
 * Tap allows you to listen on values, without modifying them.
 *
 * @param fn - function to call for each value.
 */
export declare function opTapSync<T>(tapFn: (v: T) => void): (iter: Iterable<T>) => Iterable<T>;
/**
 * Tap allows you to listen on values, without modifying them.
 *
 * @param fn - function to call for each value.
 */
export declare const opTap: <T>(fn: (v: T) => void) => import("../internalTypes").PipeFn<T, T>;
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