| library unsupported_operators; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/coverage/operator_unsupported_test.dart:13:17: Error: The '===' operator is not supported. | 
 | //     print(super === null); // Error | 
 | //                 ^ | 
 | // | 
 | // pkg/front_end/testcases/coverage/operator_unsupported_test.dart:14:17: Error: The '!==' operator is not supported. | 
 | //     print(super !== null); // Error | 
 | //                 ^ | 
 | // | 
 | // pkg/front_end/testcases/coverage/operator_unsupported_test.dart:21:15: Error: The '===' operator is not supported. | 
 | //   print("foo" === null); // Error | 
 | //               ^ | 
 | // | 
 | // pkg/front_end/testcases/coverage/operator_unsupported_test.dart:22:15: Error: The '!==' operator is not supported. | 
 | //   print("foo" !== null); // Error | 
 | //               ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | class C extends core::Object { | 
 |   synthetic constructor •() → self::C | 
 |     ; | 
 |   method m() → dynamic | 
 |     ; | 
 | } | 
 | static method foo() → void | 
 |   ; |