| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:11:7: Error: Can't use 'Double' as a mixin because it has constructors. | 
 | // class WithFinal with Double {} /* Error */ | 
 | //       ^ | 
 | // sdk/lib/ffi/native_type.dart:*: Context: This constructor prevents using 'Double' as a mixin. | 
 | //   const Double(); | 
 | //         ^ | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:11:22: Error: The class 'Double' can't be used as a mixin because it isn't a mixin class nor a mixin. | 
 | // class WithFinal with Double {} /* Error */ | 
 | //                      ^ | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:13:34: Error: The class 'Double' can't be implemented outside of its library because it's a final class. | 
 | // class ImplementsFinal implements Double {} /* Error */ | 
 | //                                  ^ | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:15:28: Error: The class 'Double' can't be extended outside of its library because it's a final class. | 
 | // class ExtendsFinal extends Double {} /* Error */ | 
 | //                            ^ | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:22:33: Error: The class 'Opaque' can't be implemented outside of its library because it's a base class. | 
 | // class ImplementsBase implements Opaque {} /* Error */ | 
 | //                                 ^ | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:26:32: Error: The class 'Finalizable' can't be extended outside of its library because it's an interface class. | 
 | // class ExtendsInterface extends Finalizable {} /* Error */ | 
 | //                                ^ | 
 | // | 
 | // pkg/front_end/testcases/class_modifiers/ffi_exception.dart:26:7: Error: The superclass, 'Finalizable', has no unnamed constructor that takes no arguments. | 
 | // class ExtendsInterface extends Finalizable {} /* Error */ | 
 | //       ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 | import "dart:ffi" as ffi; | 
 |  | 
 | import "dart:ffi"; | 
 |  | 
 | class WithFinal extends self::_WithFinal&Object&Double { | 
 |   synthetic constructor •() → self::WithFinal | 
 |     : super self::_WithFinal&Object&Double::•() | 
 |     ; | 
 | } | 
 | class ImplementsFinal extends core::Object implements ffi::Double { | 
 |   synthetic constructor •() → self::ImplementsFinal | 
 |     : super core::Object::•() | 
 |     ; | 
 | } | 
 | class ExtendsFinal extends ffi::Double { | 
 |   synthetic constructor •() → self::ExtendsFinal | 
 |     : super ffi::Double::•() | 
 |     ; | 
 | } | 
 | class ExtendsBase extends ffi::Opaque { | 
 |   synthetic constructor •() → self::ExtendsBase | 
 |     : super ffi::Opaque::•() | 
 |     ; | 
 | } | 
 | class ImplementsBase extends core::Object implements ffi::Opaque { | 
 |   synthetic constructor •() → self::ImplementsBase | 
 |     : super core::Object::•() | 
 |     ; | 
 | } | 
 | class ExtendsInterface extends ffi::Finalizable { | 
 |   synthetic constructor •() → self::ExtendsInterface | 
 |     : invalid-initializer | 
 |     ; | 
 | } | 
 | abstract final class _WithFinal&Object&Double = core::Object with ffi::Double /*isAnonymousMixin,hasConstConstructor*/  { | 
 |   const synthetic constructor •() → self::_WithFinal&Object&Double | 
 |     : super core::Object::•() | 
 |     ; | 
 | } |