Method newTrace

packages/firebase-performance/index.ios.ts:158–160

(identifier: string)

		return HttpMetric.fromUrlMethod(url, httpMethod);
	}
	newTrace(identifier: string): Trace {
		return Trace.fromNative(this.native.traceWithName(identifier));
	}

	startTrace(identifier: string): Trace {
		const trace = Trace.fromNative(this.native.traceWithName(identifier));