|  | library; | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | class Foo extends core::Object { | 
|  | field self::Bar _field = new self::Bar::•(); | 
|  | synthetic constructor •() → self::Foo | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | class Bar extends core::Object { | 
|  | synthetic constructor •() → self::Bar | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | static method useCallback(dynamic callback) → dynamic { | 
|  | callback{dynamic}(); | 
|  | } | 
|  | static method main() → dynamic { | 
|  | dynamic x; | 
|  | function inner() → self::Foo { | 
|  | x = new self::Foo::•(); | 
|  | return new self::Foo::•(); | 
|  | } | 
|  | self::useCallback(inner); | 
|  | inner(){() → self::Foo}.{self::Foo::_field}{self::Bar}; | 
|  | } |