mixin M1 on Enum {
  final int values = 42;
}
mixin M2 on Enum {
  static final int values = 42;
}
mixin M3 on Enum {
  void set values(String x) {}
}
mixin M4 on Enum {
  static void set values(String x) {}
}
mixin M5 on Enum {
  num get values => 0;
  void set values(num x) {}
}

abstract class E1 extends Enum {
  int values() => 42;
}

abstract class E2 extends Enum {
  static int values() => 42;
}

abstract class E3 extends Enum {
  void set values(num x) {}
}

abstract class E4 extends Enum {
  static void set values(num x) {}
}

abstract class E5 extends Enum {
  num get values => 0;
  void set values(num x) {}
}

main() {}