|  | library; | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | class A<X extends core::Object? = dynamic> extends core::Object { | 
|  | synthetic constructor •() → self::A<self::A::X%> | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | class B extends self::A<Null> { | 
|  | synthetic constructor •() → self::B | 
|  | : super self::A::•() | 
|  | ; | 
|  | } | 
|  | class C extends core::Object { | 
|  | synthetic constructor •() → self::C | 
|  | : super core::Object::•() | 
|  | ; | 
|  | method foo(Null n, self::A<Null> an) → Null | 
|  | return n; | 
|  | } | 
|  | static method foo() → dynamic { | 
|  | return <core::List<self::A<Null>?>>[<Null>[], <self::A<Null>>[]]; | 
|  | } | 
|  | static method bar() → dynamic { | 
|  | return <core::List<self::A<Null>?>>[#C1, #C2]; | 
|  | } | 
|  | static method main() → dynamic {} | 
|  |  | 
|  | constants  { | 
|  | #C1 = <Null>[] | 
|  | #C2 = <self::A<Null>>[] | 
|  | } |