export default class Tabs {
    _documentElement: Document;
    _tabsElement: Element;
    constructor(documentElement: Document, tabsElement: Element | undefined);
    private initTabs;
    private showTab;
    private initDropdownClick;
    private expand;
    private closeDropdown;
    private initShowHideDropdown;
    private checkDropdownVisibility;
    destroy(): void;
}