List<SipApplicationSessionAttributeListener> sipApplicationSessionAttributeListeners =
getSipApplicationListeners().getSipApplicationSessionAttributeListeners();
// If there are at least one, create event and call all of them.
if (sipApplicationSessionAttributeListeners != null
&& !sipApplicationSessionAttributeListeners.isEmpty()) {
SipApplicationSessionBindingEvent event = new SipApplicationSessionBindingEvent(this,
attributeName);
for (SipApplicationSessionAttributeListener listener : sipApplicationSessionAttributeListeners) {
callback.call(event, listener);
}
}