[aerogear-dev] Java Sender API - fire&forget - adding callback methods?

Hi, I went once again through http://lists.jboss.org/pipermail/aerogear-dev/2013-June/002901.html - which says that Sender API should be fire&forget. It feels more like "maybe fire"&forget, for instance it does not say that your credentials were wrong - or it says, you need parse logs to get that information. If I think about Android, iOS, JS solutions to communicate with UnifiedPush we provide - Pipes - they always provide a callback to be executed on success/failure. Could we add callback to Sender API? Or should not Aerogear rather have something like Pipes abstraction for Java developers instead of pretty dumb Sender API? Thoughts? Thanks, Karel