toJson method

@override Map<String, dynamic> toJson()

Implementation

@override
Map<String, dynamic> toJson() {
  final json = <String, dynamic>{};

  void addIfPresent(String fieldName, dynamic value) {
    if (value != null) {
      json[fieldName] = value;
    }
  }

  addIfPresent('raster-opacity', rasterOpacity);
  addIfPresent('raster-hue-rotate', rasterHueRotate);
  addIfPresent('raster-brightness-min', rasterBrightnessMin);
  addIfPresent('raster-brightness-max', rasterBrightnessMax);
  addIfPresent('raster-saturation', rasterSaturation);
  addIfPresent('raster-contrast', rasterContrast);
  addIfPresent('raster-resampling', rasterResampling);
  addIfPresent('raster-fade-duration', rasterFadeDuration);
  addIfPresent('visibility', visibility);
  return json;
}