/**
 * Handles aria-hidden for dialogs.
 */
export default class AriaIsolate {
    private element;
    private affectedElements;
    constructor(el: HTMLElement);
    /**
     * applies aria-hidden to everything except direct parents of `this.element`
     */
    activate(): void;
    /**
     * restores aria-hidden state by removing aria-hidden="true"
     * from everything affected by 'activate'
     */
    deactivate(): void;
}