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

class A extends core::Object implements self::B {
  field core::int? x = null;
  synthetic constructor •() → self::A
    : super core::Object::•()
    ;
}
class B extends core::Object {
  field core::int? x = self::nullableInt;
  synthetic constructor •() → self::B
    : super core::Object::•()
    ;
}
static field core::int? nullableInt = 0;
static method main() → dynamic {}