/**
 * checks each value of the specified `Iterable`
 * if the value is `Iterable` yields its values otherwise yields the value itself
 *
 * @param iterable - `Iterable` object on flat
 *
 * @returns new `IterableIterator` with possibly flatted values
 *
 * @example
 * function* gen(): Generator<number | Iterable<number>> {
 *   yield 1;
 *   yield [2, 3];
 * }
 * flat(gen()); // IterableIterator<1, 2, 3>
 */
export declare function flat<T>(iterable: Iterable<T | Iterable<T>>): IterableIterator<T>;
/**
 * checks each value of the specified `AsyncIterable`
 * if the value is any iterable yields its values otherwise yields the value itself
 *
 * @param iterable - `AsyncIterable` object on flat
 *
 * @returns new `AsyncIterableIterator` with possibly flatted values
 *
 * @example
 * async function* gen(): AsyncGenerator<number | Iterable<number> | AsyncIterable<number>> {
 *   yield 1;
 *   yield [2];
 *   yield (async function* () { yield 3; })();
 * }
 * flat(gen()); // IterableIterator<1, 2, 3>
 */
export declare function flat<T>(iterable: AsyncIterable<T | AnyIterable<T>>): AsyncIterableIterator<T>;
/**
 * service overload
 */
export declare function flat<T>(iterable: AnyIterable<T | AnyIterable<T>>): AnyIterableIterator<T>;