|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue44733.dart:22:3: Error: Type 'F' not found. | 
|  | //   F get y => super.y as F; | 
|  | //   ^ | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue44733.dart:5:16: Error: 'A' doesn't implement 'D' so it can't be used with 'C'. | 
|  | //  - 'A' is from 'pkg/front_end/testcases/general/issue44733.dart'. | 
|  | //  - 'D' is from 'pkg/front_end/testcases/general/issue44733.dart'. | 
|  | //  - 'C' is from 'pkg/front_end/testcases/general/issue44733.dart'. | 
|  | // abstract class B extends A with C {} | 
|  | //                ^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | abstract class B extends self::_B&A&C { | 
|  | synthetic constructor •() → self::B | 
|  | ; | 
|  | } | 
|  | abstract class C extends self::D /*isMixinDeclaration*/  { | 
|  | } | 
|  | abstract class E extends core::Object { | 
|  | synthetic constructor •() → self::E | 
|  | ; | 
|  | } | 
|  | abstract class D extends core::Object { | 
|  | synthetic constructor •() → self::D | 
|  | ; | 
|  | get y() → self::E | 
|  | ; | 
|  | } | 
|  | abstract class A extends core::Object { | 
|  | synthetic constructor •() → self::A | 
|  | ; | 
|  | get y() → invalid-type | 
|  | ; | 
|  | } | 
|  | abstract class _B&A&C = self::A with self::C /*isAnonymousMixin*/  { | 
|  | synthetic constructor •() → self::_B&A&C | 
|  | : super self::A::•() | 
|  | ; | 
|  | } | 
|  | static get x() → self::B | 
|  | ; | 
|  | static method f() → void | 
|  | ; | 
|  | static method main() → dynamic | 
|  | ; |