code: private Property<CircularProgressDrawable, Float> createAngleProperty() {
          return new Property<CircularProgressDrawable, Float>(Float.class, "angle") {
  
              @Override
              public Float get(final CircularProgressDrawable object) {
                  return currentGlobalAngle;
              }
  
              @Override
              public void set(final CircularProgressDrawable object, final Float value) {
                  currentGlobalAngle = value;
                  invalidateSelf();
              }
  
          };
      }
docs: Creates and returns a property, which allows to animate the global angle of the progress
  drawable.
  
  @return The property, which has been created, as an instance of the class {@link Property}