declare const _default: (func: any) => any;
/**
 * @param {Function} func - Callback function to be set.
 * @returns {(Function|undefined)} Run a function that been passed, return undefined if not exist.
 * @description Set function based on function parameter passed, set undefined if no function parameter passed. Use this method if you wanted to validate passed function to another function.
 */
export default _default;