import { AngularFirePerformance } from '@angular/fire/performance';
import { IPerformanceTrace, IPerformanceProvider } from '../interfaces';
export declare class PerformanceTraceNoop implements IPerformanceTrace {
    start(): void;
    stop(): void;
    putAttribute(key: string, value: any): void;
}
export declare class PerformanceService implements IPerformanceProvider {
    dataCollectionEnabled: Promise<boolean>;
    createTrace(label: string): Promise<IPerformanceTrace>;
    constructor(performanceProvider: AngularFirePerformance);
}