class Type {
     String name;
}

class Language extends Type {
     String id;
     Language(this.name) {

class Type {
  String name;
}

class Language extends Type {
  String id;
  Language(name) {
    this.name = name;
  }
}

class Type {
  String name;
  Type();
  Type.withName(this.name);
}

class Language extends Type {
  String id;
  Language(name) : super.withName(name);
}