/* Preference Screens */
        mNotificationScreen = (PreferenceScreen) prefSet.findPreference(NOTIFICATION_SCREEN);
        mTrackballScreen = (PreferenceScreen) prefSet.findPreference(NOTIFICATION_TRACKBALL);
        mExtrasScreen = (PreferenceScreen) prefSet.findPreference(EXTRAS_SCREEN);

        boolean hasDualLed = (getResources().getBoolean(R.bool.has_dual_notification_led)
                || getResources().getBoolean(R.bool.has_mixable_dual_notification_led));
        if (!getResources().getBoolean(R.bool.has_rgb_notification_led) && !hasDualLed) {
            ((PreferenceCategory) prefSet.findPreference(GENERAL_CATEGORY))
                    .removePreference(mTrackballScreen);
        }