| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/extensions/extension_constructor.dart:8:3: Error: Extensions can't declare constructors. | 
 | // Try removing the constructor declaration. | 
 | //   Extension() {} | 
 | //   ^^^^^^^^^ | 
 | // | 
 | // pkg/front_end/testcases/extensions/extension_constructor.dart:9:3: Error: Extensions can't declare constructors. | 
 | // Try removing the constructor declaration. | 
 | //   Extension.named() {} | 
 | //   ^^^^^^^^^ | 
 | // | 
 | // pkg/front_end/testcases/extensions/extension_constructor.dart:10:3: Error: Extensions can't declare constructors. | 
 | // Try removing the constructor declaration. | 
 | //   factory Extension.fact() => null; | 
 | //   ^^^^^^^ | 
 | // | 
 | // pkg/front_end/testcases/extensions/extension_constructor.dart:11:3: Error: Extensions can't declare constructors. | 
 | // Try removing the constructor declaration. | 
 | //   factory Extension.redirect() = Extension; | 
 | //   ^^^^^^^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | class Class extends core::Object { | 
 |   synthetic constructor •() → self::Class | 
 |     : super core::Object::•() | 
 |     ; | 
 | } | 
 | extension Extension on self::Class { | 
 |   method method = self::Extension|method; | 
 |   method tearoff method = self::Extension|get#method; | 
 | } | 
 | static extension-member method Extension|method(lowered final self::Class #this) → dynamic {} | 
 | static extension-member method Extension|get#method(lowered final self::Class #this) → () → dynamic | 
 |   return () → dynamic => self::Extension|method(#this); | 
 | static method main() → dynamic {} |