Identity of plugin

Hi all, I have a question: my plugin must do a query to server and I don’t know what is the identity of plugin. I explain better, my code is:

PubSub pubSub = new PubSub();

pubSub.setFrom("???(MYPLUGIN)");

pubSub.setTo(“pubsub.nameserver”);

pubSub.setType(IQ.Type.SET);

What should I write in setFrom???Many thanks

Nobody???