/**
 * Adds a show_when to a component.
 * If the component has no show_when, then an array is created
 * with condition as the only entry.
 * If the component has existing show_whens then condition is
 * appended to the existing array.
 * @param {*} component The component to add the show_when to.
 * @param {*} condition The show_when condition to add.
 * @returns The component with the new show_when added.
 *          null if component or condition are invalid.
 */
declare const addShowWhen: (component: any, condition: any) => any;
export default addShowWhen;