library test; | |
abstract class A { | |
int? get x; | |
} | |
abstract class B { | |
int? get x; | |
} | |
abstract class C { | |
num? get x; | |
} | |
abstract class D { | |
double? get x; | |
} | |
class E extends A implements B { | |
var x; | |
} | |
class F extends A implements C { | |
var x; | |
} | |
class G extends A implements D { | |
var x; | |
} | |
class H extends C implements D { | |
var x; | |
} | |
main() {} |