export default class Functions {
    /**
     * Checks the given function is exist or not.
     * @param fn {any}
     * @return {boolean}
     */
    static has(fn: any): boolean;
    /**
     * Checks the given value is a function or not
     * @param fn
     * @return {boolean}
     */
    static is(fn: any): boolean;
    /**
     * Checks the given function name
     * @param fn
     */
    static getName(fn: any): any;
}