library test; | |
abstract class A { | |
int? get x; | |
} | |
mixin class B { | |
int? get x => 0; | |
} | |
class C extends A { | |
var x; | |
} | |
class D extends B { | |
var x; | |
} | |
class E implements A { | |
var x; | |
} | |
class F implements B { | |
var x; | |
} | |
class G extends Object with B { | |
var x; | |
} | |
main() {} |