protected virtual async Task <IGetOperationResult> PerformGetAndTouchCore(string key, Expiration expiration, ulong cas) { try { var op = opFactory.GetAndTouch(keyTransformer.Transform(key), expiration.Value, cas); await cluster.Execute(op).ConfigureAwait(false); return(op.Result); } catch (IOException e) { return(new GetOperationResult().FailWith(e)); } }