private async Task <(byte[], long)> GetAssemblyForSpecification(string specificationId, string etag)
{
Stopwatch assemblyLookupStopwatch = Stopwatch.StartNew();
byte[] assembly = await _assemblyService.GetAssemblyForSpecification(specificationId, etag);
assemblyLookupStopwatch.Stop();
return(assembly, assemblyLookupStopwatch.ElapsedMilliseconds);
}