anchor.diff:  }
   pin.low();
   
  +=== Blinking LED
   Example for reading and waiting for pin value change:
   [source,java]
  ----
   Gpio gpio = new Gpio(new BeagleboneGpioFactory());
   BinaryInputPin pin = gpio.binaryInputPin(BeagleboneGPio.P9_11);
   System.out.println("value: " + pin.isHigh());
  
positive.code: }
  pin.dutyCycle(0);
  pin.close();
  ---
  
  
negative.code:     pin.waitForEdge(Edge.RISING);
      System.out.println("value2: " + pin.isHigh());
  }
  
  === PWM
  Example for PWM output:
  [source,java]
  Gpio gpio = new Gpio(new BeagleboneGpioFactory());
  PwmOutputPin pin = gpio.pwmOutputPin(BeagleboneGPio.P9_22);
  for (int i=0; i<10; i++) {
  