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

abstract class A<X extends core::Object? = dynamic> extends core::Object {
  synthetic constructor •() → self::A<self::A::X%>
    ;
  abstract get g() → (self::A::X%) → void;
}
class B extends core::Object implements self::A<core::int> {
  synthetic constructor •() → self::B
    ;
  get g() → (core::int) → void
    ;
}
static field core::int callCount;
static method foo(core::Object o, core::num value) → void
  ;
static method main() → void
  ;
static method expect(dynamic expected, dynamic actual) → dynamic
  ;
static method throws(() → void f) → dynamic
  ;