docs: private int getCurrentlyShowingValue() {
          int currentIndex = getCurrentItemShowing();
          switch(currentIndex) {
              case HOUR_INDEX:
                  return mCurrentTime.getHour();
              case MINUTE_INDEX:
                  return mCurrentTime.getMinute();
              case SECOND_INDEX:
                  return mCurrentTime.getSecond();
              default:
                  return -1;
          }
      }