code: public void setLedBlinking(final boolean LED_BLINKING) {
          ledBlinking = LED_BLINKING;
          if (LED_BLINKING) {
              LED_BLINKING_TIMER.start();
          } else {
              setCurrentLedImage(getLedImageOff());
              LED_BLINKING_TIMER.stop();
          }
      }
docs: Sets the state of the threshold led.
  The led could blink which will be triggered by a javax.swing.Timer
  that triggers every 500 ms. The blinking will be done by switching
  between two images.
  @param LED_BLINKING