library /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;

class A<X extends core::Object? = dynamic> extends core::Object {
  synthetic constructor •() → self::A<self::A::X%>
    : super core::Object::•()
    ;
}
abstract class _B&Object&A<Z extends core::Object? = dynamic> extends core::Object implements self::A<() → self::_B&Object&A::Z%> /*isAnonymousMixin,isEliminatedMixin,hasConstConstructor*/  {
  const synthetic constructor •() → self::_B&Object&A<self::_B&Object&A::Z%>
    : super core::Object::•()
    ;
}
class B<Z extends core::Object? = dynamic> extends self::_B&Object&A<self::B::Z%> {
  synthetic constructor •() → self::B<self::B::Z%>
    : super self::_B&Object&A::•()
    ;
}
static method main() → dynamic {}