hello.dart

void main(){
  //error
  const adj = Adjustments(brightness: 1.1);
  //fine
  const adj = Adjustments(brightness: 1.0);
}
class Adjustments {
  final double brightness;
  final double hue;
  final double saturation;
  final double blur;
  const Adjustments({
    double brightness = 0.0,
    double hue = 0.0,
    double saturation = 0.0,
    double blur = 0.0,
  })  : brightness = brightness * 100,
        hue = hue * 100,
        saturation = saturation * 100,
        blur = blur * 100,
        assert(brightness >= 0.0 && brightness <= 1.0),
        assert(hue >= 0.0 && hue <= 1.0),
        assert(saturation >= 0.0 && saturation <= 1.0),
        assert(blur >= 0.0 && blur <= 1.0);
}