|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/extensions/issue40713.dart:17:9: Error: 'safeFirst' isn't a function or method and can't be invoked. | 
|  | //   list2.safeFirst(0); | 
|  | //         ^ | 
|  | // | 
|  | // pkg/front_end/testcases/extensions/issue40713.dart:22:8: Error: 'safeFirst' isn't a function or method and can't be invoked. | 
|  | //   list.safeFirst(); | 
|  | //        ^ | 
|  | // | 
|  | // pkg/front_end/testcases/extensions/issue40713.dart:24:9: Error: 'safeFirst' isn't a function or method and can't be invoked. | 
|  | //   list2.safeFirst(); | 
|  | //         ^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | extension SafeAccess<T extends core::Object* = dynamic> on core::Iterable<T*>* { | 
|  | get safeFirst = self::SafeAccess|get#safeFirst; | 
|  | } | 
|  | static method SafeAccess|get#safeFirst<T extends core::Object* = dynamic>(final core::Iterable<self::SafeAccess|get#safeFirst::T*>* #this) → self::SafeAccess|get#safeFirst::T* { | 
|  | return #this.{core::Iterable::isNotEmpty} ?{self::SafeAccess|get#safeFirst::T*} #this.{core::Iterable::first} : null; | 
|  | } | 
|  | static method main() → dynamic {} | 
|  | static method test() → void { | 
|  | final core::List<dynamic>* list = <dynamic>[]; | 
|  | self::SafeAccess|get#safeFirst<dynamic>(list).call(); | 
|  | final core::List<(core::int*) →* void>* list2 = <(core::int*) →* void>[]; | 
|  | invalid-expression "pkg/front_end/testcases/extensions/issue40713.dart:17:9: Error: 'safeFirst' isn't a function or method and can't be invoked. | 
|  | list2.safeFirst(0); | 
|  | ^"; | 
|  | } | 
|  | static method errors() → void { | 
|  | final core::List<core::Object*>* list = <core::Object*>[]; | 
|  | invalid-expression "pkg/front_end/testcases/extensions/issue40713.dart:22:8: Error: 'safeFirst' isn't a function or method and can't be invoked. | 
|  | list.safeFirst(); | 
|  | ^"; | 
|  | final core::List<(core::int*) →* void>* list2 = <(core::int*) →* void>[]; | 
|  | invalid-expression "pkg/front_end/testcases/extensions/issue40713.dart:24:9: Error: 'safeFirst' isn't a function or method and can't be invoked. | 
|  | list2.safeFirst(); | 
|  | ^"; | 
|  | } |