import { Subject } from 'rxjs';
/**
 * @internal
 * @ignore
 */
export declare class PerformanceMonitor {
    paintTime$: Subject<string>;
    get enabled(): boolean;
    private _timestamp?;
    private _obsever?;
    constructor(element: Element);
    reset(): void;
    destroy(): void;
    private _onPaint;
    private _isRow;
}