library test;
import self as self;
import "dart:core" as core;

class B<T extends core::Object* = dynamic> extends core::Object {
  generic-covariant-impl field self::B::T* x = null;
  generic-covariant-impl field self::B::T* y = null;
  synthetic constructor •() → self::B<self::B::T*>*
    : super core::Object::•()
    ;
}
abstract class C<T extends core::Object* = dynamic> extends core::Object implements self::B<core::num*> {
  generic-covariant-impl field core::num* x = null;
  synthetic constructor •() → self::C<self::C::T*>*
    : super core::Object::•()
    ;
  abstract get y() → core::num*;
  abstract set y(generic-covariant-impl core::num* value) → void;
}
abstract class D<T extends core::Object* = dynamic> extends core::Object implements self::B<self::D::T*> {
  generic-covariant-impl field self::D::T* x = null;
  synthetic constructor •() → self::D<self::D::T*>*
    : super core::Object::•()
    ;
  abstract get y() → self::D::T*;
  abstract set y(generic-covariant-impl self::D::T* value) → void;
}
static method main() → dynamic {}