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

typedef F<invariant X extends core::Object* = dynamic> = <Y extends X* = dynamic>() →* void;
typedef Fcov<X extends core::Object* = dynamic> = () →* X*;
typedef Fcon<contravariant X extends core::Object* = dynamic> = (X*) →* dynamic;
typedef Finv<invariant X extends core::Object* = dynamic> = (X*) →* X*;
typedef FcovBound<X extends core::num* = core::num*> = () →* X*;
typedef FconBound<contravariant X extends core::num* = core::num*> = (X*) →* dynamic;
typedef FinvBound<invariant X extends core::num* = core::num*> = (X*) →* X*;
typedef FcovCyclicBound<X extends self::A<X*>* = self::A<dynamic>*> = () →* X*;
typedef FconCyclicBound<contravariant X extends self::A<X*>* = self::A<core::Null?>*> = (X*) →* dynamic;
typedef FinvCyclicBound<invariant X extends self::A<X*>* = self::A<dynamic>*> = (X*) →* X*;
typedef FcovCyclicCoBound<X extends (X*) →* dynamic = (core::Null?) →* dynamic> = () →* X*;
typedef FconCyclicCoBound<contravariant X extends (X*) →* dynamic = (dynamic) →* dynamic> = (X*) →* dynamic;
typedef FinvCyclicCoBound<invariant X extends (X*) →* dynamic = (dynamic) →* dynamic> = (X*) →* X*;
class A<X extends core::Object* = dynamic> extends core::Object {
  synthetic constructor •() → self::A<self::A::X*>*
    ;
}
class B<X extends core::Object* = dynamic> extends core::Object {
  synthetic constructor •() → self::B<self::B::X*>*
    ;
}
static method toF<X extends core::Object* = dynamic>(self::toF::X* x) → <Y extends self::toF::X* = dynamic>() →* void
  ;
static method testTopLevel() → void
  ;
static method testNested() → void
  ;
static method main() → dynamic
  ;