docs: public void setLedBlinking(final boolean BLINKING) {
          if (null == ledBlinking) {
              _ledBlinking = BLINKING;
              if (_ledBlinking) {
                  startBlinkExecutorService();
              } else {
                  if (null != blinkFuture) blinkFuture.cancel(true);
                  setLedOn(false);
              }
          } else {
              ledBlinking.set(BLINKING);
          }
      }