import { DOMWidgetView } from '@jupyter-widgets/base';
import * as d3 from 'd3';
export declare class Tooltip extends DOMWidgetView {
    initialize(): void;
    render(): void;
    create_listeners(): void;
    update_formats(): void;
    update_tooltip(data: any): void;
    create_table(): void;
    d3el: d3.Selection<HTMLElement, any, any, any>;
    parent: DOMWidgetView;
    tooltip_formats: ((x: any) => string)[];
}