m = registration.listener.onPreMessageReceived(this, m); if (m == null) break;
m = registration.listener.onPreMessageReceived(this, m); if (m == null) break;
m = registration.listener.onPreMessageReceived(this, m); if (m == null) break;
m = registration.listener.onPreMessageReceived(this, m); if (m == null) break;