import type { IWidgetTracker } from '@jupyterlab/apputils';
import { Token } from '@lumino/coreutils';
import type { HTMLViewer } from './widget';
/**
 * A class that tracks HTML viewer widgets.
 */
export interface IHTMLViewerTracker extends IWidgetTracker<HTMLViewer> {
}
/**
 * The HTML viewer tracker token.
 */
export declare const IHTMLViewerTracker: Token<IHTMLViewerTracker>;