class A { | |
final int foo; | |
const A(this.foo); | |
} | |
class B extends A { | |
const B(int foo) : super(foo); | |
} | |
class C extends B { | |
const C(int foo) : super(foo); | |
} | |
class D extends B { | |
const D(int foo) : super(foo); | |
bool operator ==(dynamic other) => identical(this, other); | |
} | |
bar(B b) {} | |
main() {} |