Android / Log / Timber - print line number on timber logs. source=https://caster.io/episodes/episode-14-logging-with-timber/
public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        Timber.plant(new Timber.DebugTree() {
            @Override
            protected String createStackElementTag(StackTraceElement element) {
                return super.createStackElementTag(element) + ":" + element.getLineNumber();
            }
        });
    }
}