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

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