import * as THREE from 'three';
export declare class SceneStatsMonitor {
    private readonly _container;
    private readonly _statsDiv;
    private readonly _darkModeObserver;
    private readonly _valueElements;
    private readonly UPDATE_FREQUENCY;
    private _frames;
    private _prevTime;
    private _fps;
    private _updateCounter;
    private _cachedStats;
    private _needsFullRecalculation;
    private _lastCache;
    constructor();
    private _createStatRow;
    set visible(visible: boolean);
    get visible(): boolean;
    private _updateFPS;
    update(renderer: THREE.WebGLRenderer, scene: THREE.Scene, helpersGroup: THREE.Group): void;
    private _isHelper;
    private _updateDarkMode;
    private _calculateSceneStats;
    private _updateIfChanged;
    private _updateDisplay;
    invalidateCache(): void;
    dispose(): void;
}