import { BoxModel as JupyterBoxModel } from '@jupyter-widgets/controls';
import { FoldoutView } from './Foldout';
export declare class SparkFoldoutModel extends JupyterBoxModel {
    defaults(): {
        _view_name: string;
        _model_name: string;
        _model_module: string;
        _view_module: string;
        _model_module_version: any;
        _view_module_version: any;
    };
}
export declare class SparkFoldoutView extends FoldoutView {
    getPreviewContent(): HTMLElement;
    addCustomStyleToPreviewContainer(node: HTMLElement): void;
}