class Super {
  int extendedConcreteField = 0;
  abstract int extendedAbstractField;
  int extendedConcreteMixedInConcreteField = 0;
  abstract int extendedAbstractMixedInConcreteField;
  int extendedConcreteMixedInAbstractField = 0;
  abstract int extendedAbstractMixedInAbstractField;
}

class Mixin {
  int mixedInConcreteField = 0;
  abstract int mixedInAbstractField;
  int extendedConcreteMixedInConcreteField = 0;
  int extendedAbstractMixedInConcreteField = 0;
  abstract int extendedConcreteMixedInAbstractField;
  abstract int extendedAbstractMixedInAbstractField;
}

class ClassMixin extends Super with Mixin {}

class NamedMixin = Super with Mixin;
main() {}