/** @packageDocumentation
 * @module Widgets
 */
import { Viewport } from "@itwin/core-frontend";
/** Outputs statistics related to tile requests including the current number of active, pending, selected, and ready tile requests; as well as cumulative statistics for the session including the number of failed, timed-out, empty, and elided tile requests.
 * @beta
 */
export declare class TileStatisticsTracker {
    private readonly _statElements;
    private readonly _div;
    private readonly _vp;
    private _curIntervalId?;
    constructor(parent: HTMLElement, vp: Viewport);
    [Symbol.dispose](): void;
    private addMaxActive;
    private updateMaxActive;
    private clearInterval;
    private toggle;
    private update;
    private reset;
}
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