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

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