code: @Override
      public void setBreak(boolean enabled) throws IllegalStateException, IOException{
          // validate state
          if (isClosed())
              throw new IllegalStateException("Serial connection is not open; cannot 'setBreak()'.");
  
          // control the constant state of the BREAK signal
          com.pi4j.jni.Serial.setBreak(fileDescriptor, enabled);
      }
docs: <p>
  Send a constant BREAK signal to connected device. (Turn break on/off)
  When enabled this will send a steady stream of zero bits.
  When enabled, no (other) data transmitting is possible.
  </p>
  
  @param enabled
  The enable or disable state to control the BREAK signal
  @throws IllegalStateException thrown if the serial port is not already open.
  @throws IOException thrown on any error.