code: @Override
      public void parse(final String... parameters) {
          // Manage gray scale
          if (parameters.length >= 1) {
              grayProperty().set(Double.parseDouble(parameters[0]));
          }
          // Opacity
          if (parameters.length == 2) {
              opacityProperty().set(Double.parseDouble(parameters[1]));
          }
      }
docs: {@inheritDoc}