abstract class SuperClass1 {
  SuperClass1(this.value);
  final String value;
}

abstract class SuperClass2 {
  SuperClass2(String i) : value = i;
  final String value;
}

class Mixin {}

class NamedMixin1 = SuperClass1 with Mixin;
class NamedMixin2 = SuperClass2 with Mixin;
errors() {}
void main() {}