/**
 * Checks whether a given function is an async function.
 *
 * Compares the constructor of {@link fn} against the `AsyncFunction` constructor
 * to determine if it was declared with the `async` keyword.
 *
 * @param fn - The function to check.
 * @returns `true` if {@link fn} is an async function, `false` otherwise.
 */
declare const _default: (fn: Function) => boolean;
export default _default;