|  | library; | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | static method main() → dynamic {} | 
|  | static method test<X extends Null, Y extends Never?, Z extends Never>() → dynamic { | 
|  | (Null) → core::int f = (core::Object? x) → core::int => 1; | 
|  | (Never) → core::int g = (core::Object? x) → core::int => 1; | 
|  | (Never?) → core::int h = (core::Object? x) → core::int => 1; | 
|  | (core::String) → core::int i = (core::String x) → core::int => 1; | 
|  | (self::test::X%) → core::int j = (core::Object? x) → core::int => 1; | 
|  | (self::test::Y%) → core::int k = (core::Object? x) → core::int => 1; | 
|  | (self::test::Z) → core::int l = (core::Object? x) → core::int => 1; | 
|  | (self::test::Z?) → core::int m = (core::Object? x) → core::int => 1; | 
|  | } |