* @return True, if invisibility is supported.
* @throws rocks.xmpp.core.stanza.model.StanzaException If the entity returned a stanza error.
* @throws rocks.xmpp.core.session.NoResponseException If the entity did not respond.
*/
public boolean isSupported() throws XmppException {
EntityCapabilitiesManager entityCapabilitiesManager = xmppSession.getExtensionManager(EntityCapabilitiesManager.class);
return entityCapabilitiesManager.isSupported(Invisible.NAMESPACE, Jid.valueOf(xmppSession.getDomain()));
}