public async void Retrieve()
{
var retrieveResult = await _metadataClient.Retrieve();
Assert.IsNotNull(retrieveResult);
Assert.IsNotNull(retrieveResult.Done);
Assert.IsNotNull(retrieveResult.Id);
Assert.IsNotNull(retrieveResult.State);
Assert.AreEqual(retrieveResult.Done, false);
Assert.AreEqual(retrieveResult.State, "Queued");
}