|  | 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 | 
|  | ; | 
|  | } | 
|  | 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 | 
|  | ; |