// @dart = 2.9
abstract class Super {
  void concreteExtendsConcreteMixin() {}
  void concreteExtendsAbstractMixin() {}
  void abstractExtendsConcreteMixin();
  void abstractExtendsAbstractMixin();
}

abstract class MixinClass {
  void concreteExtendsConcreteMixin() {}
  void concreteExtendsAbstractMixin();
  void concreteMixin() {}
  void abstractExtendsConcreteMixin() {}
  void abstractExtendsAbstractMixin();
  void abstractMixin();
}

mixin Mixin {
  void concreteExtendsConcreteMixin() {}
  void concreteExtendsAbstractMixin();
  void concreteMixin() {}
  void abstractExtendsConcreteMixin() {}
  void abstractExtendsAbstractMixin();
  void abstractMixin();
}
abstract class ClassEqMixinClass = Super with MixinClass;

abstract class ClassExtendsMixinClass extends Super with MixinClass {}

abstract class ClassEqMixin = Super with Mixin;

abstract class ClassExtendsMixin extends Super with Mixin {}

abstract class SubclassEqMixinClass extends ClassEqMixinClass {
  method() {}
}

abstract class SubclassExtendsMixinClass extends ClassExtendsMixinClass {
  method() {}
}

abstract class SubclassEqMixin extends ClassEqMixin {
  method() {}
}

abstract class SubclassExtendsMixin extends ClassExtendsMixin {
  method() {}
}

main() {}