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

typedef F = () → core::int;
abstract class A extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  abstract method x(() → core::int value) → void;
}
abstract class B extends self::A {
  synthetic constructor •() → void
    : super self::A::•()
    ;
  abstract method x(() → dynamic value) → void;
}
static method f<T extends core::Object = dynamic>() → self::f::T
  return null;
static method g(self::B b) → dynamic {
  b.{self::B::x}(self::f<() → dynamic>());
}
static method main() → dynamic {}