public Task PutAttachmentAsync(string key, Guid?etag, byte[] data, RavenJObject metadata)
{
// Should the data paramater be changed to a Stream type so it matches IDatabaseCommands.PutAttachment?
var stream = new MemoryStream();
stream.Write(data, 0, data.Length);
databaseCommands.PutAttachment(key, etag, stream, metadata);
return(new CompletedTask());
}