/**
 * Returns a boolean representing whether or not the provided value is a function that returns an async iterator.
 */
export declare const isAsyncIteratorFunction: (value: unknown) => value is () => AsyncIterator<unknown>;
/**
 * Returns a boolean representing whether or not the provided value is a function that returns an iterator.
 */
export declare const isIteratorFunction: (value: unknown) => value is () => Iterator<unknown>;