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

class B extends core::Object {
  covariant field core::num x = null;
  synthetic constructor •() → void
    : super core::Object::•()
    ;
}
class C extends core::Object {
  field core::int x = null;
  synthetic constructor •() → void
    : super core::Object::•()
    ;
}
class D extends self::C implements self::B {
  synthetic constructor •() → void
    : super self::C::•()
    ;
}
static method main() → void {}