declare namespace Util {
    const addClass: (element: HTMLElement, ...rest: string[]) => void;
    const makeButton: (name: string, action: () => any, parent: HTMLElement, classname?: string) => HTMLButtonElement;
    const makeNode: (tag: string, ...classname: string[]) => HTMLElement;
    const makeSpan: (parent: HTMLElement, content: string, ...classname: string[]) => void;
}
export default Util;