itemNode.setAttribute("jid", item.getJID().toString());
session.sendIQ("roster", iq, new IQCallback() {
@Override
public void onIQSuccess(final IQ iq) {
eventBus.fireEventFromSource(new RequestFailedEvent("rosterItemRemove", "remove roster item failed", iq), this);
}
@Override
public void onIQFailure(final IQ iq) {
}