import type { AnyFnAsync } from './index.js';
/**
 * Asserts that a value is a function using `async` and `await` syntax.
 *
 * @tags guard, functions, async
 */
export declare const isAsyncFunction: <Fn extends AnyFnAsync>(value: Fn | unknown) => value is Fn extends AnyFnAsync ? Fn : AnyFnAsync;