public class yourClass extends ListenerAdapter {
    //Your code.
}

@Override
public void onMessageReceived(MessageReceivedEvent event) {
    //Your code again.
}

[Method1]
public static void yourMethod(MessageReceivedEvent event) {
    //Your code.
}

[Method2]
@Override
public void onMessageReceived(MessageReceivedEvent event) {
    yourMethod(event);
}