class AlertConfiguration { int nutrientId; double maxValue; double minValue; AlertConfiguration({ required this.nutrientId, required this.maxValue, required this.minValue, }); Map toJson() => { 'nutrient_id': nutrientId, 'min_value': minValue, 'max_value': maxValue, }; factory AlertConfiguration.fromJson(Map json) => AlertConfiguration( nutrientId: json['nutrient_id'], minValue: json['min_value'], maxValue: json['max_value'], ); }