import { Collapse as _Collapse } from "bootstrap";
export declare class Collapse extends _Collapse {
    static CLASS_NAME_SHOW: string;
    static CLASS_NAME_COLLAPSE: string;
    static CLASS_NAME_COLLAPSING: string;
    static CLASS_NAME_COLLAPSED: string;
    static SELECTOR_ACTIVES: string;
    static SELECTOR_DATA_TOGGLE: string;
    _isShown(element?: HTMLElement): boolean;
    isCollapsed(element?: HTMLElement): boolean;
}