public override SortedDictionary<string, object> ToParamsDictionary()
{
SortedDictionary<string, object> dict = base.ToParamsDictionary();
AddParam(dict, "tag", Tag);
AddParam(dict, "notification_url", NotificationUrl);
AddParam(dict, "async", Async);
if (Transformation != null)
AddParam(dict, "transformation", Transformation.Generate());
return dict;
}