export declare class FirebaseTrace {
	setValue(attribute: string, value: string): void;

	getValue(attribute: string): string;

	getAttributes(): { [field: string]: any };

	removeAttribute(attribute: string): void;

	incrementMetric(metric: string, by: number): void;

	stop(): void;
}

export declare function startTrace(name: string): FirebaseTrace;

export declare class FirebaseHttpMetric {
	setRequestPayloadSize(size: number): void;

	setHttpResponseCode(responseCode: number): void;

	stop(): void;
}

export declare function startHttpMetric(url: string, method: string): FirebaseHttpMetric;