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Convert JSON to Dart classes

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JSON

DART

class Root {
  final String name;
  final int age;
  final bool isActive;
  final Address address;
  final List<PhoneNumbers> phoneNumbers;
  const Root({
    required this.name,
    required this.age,
    required this.isActive,
    required this.address,
    required this.phoneNumbers,
  });
  factory Root.fromJson(Map<String, dynamic> json) {
    return Root(
      name: String.fromJson(json['name']),
      age: json['age'],
      isActive: json['isActive'],
      address: Address.fromJson(json['address']),
      phoneNumbers: List<PhoneNumbers>.from(json['phoneNumbers']?.map((x) => PhoneNumbers.fromJson(x))),
    );
  }
  Map<String, dynamic> toJson() {

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