import { BaseViewer, Plugin } from "@x-viewer/core";
import Stats from "stats.js";
/**
 * Stats plugin is a debug tool for developers to observe the performance of a page.
 */
export declare class StatsPlugin extends Plugin {
    static readonly DEFAULT_ID = "StatsPlugin";
    protected stats?: Stats;
    /** Mirrors {@link setVisible}: stats.js uses `showPanel(-1)` to hide all panels. */
    private statsUiVisible;
    constructor(viewer: BaseViewer);
    /**
     * Shows or hide the stats panel, which indicates current FPS, MS, MB, etc.
     */
    setVisible(visible: boolean): void;
    isVisible(): boolean;
    destroy(): void;
}