anchor.diff:    static const CompileTimeErrorCode RETURN_OF_INVALID_TYPE_FROM_CONSTRUCTOR =
         CompileTimeErrorCodeWithUniqueName(
             'RETURN_OF_INVALID_TYPE',
  -          'CompileTimeErrorCode.RETURN_OF_INVALID_TYPE_FROM_CONSTRUCTOR',
  +          'RETURN_OF_INVALID_TYPE_FROM_CONSTRUCTOR',
             "A value of type '{0}' can't be returned from constructor '{2}' "
                 "because it has a return type of '{1}'.",
             hasPublishedDocs: true);
  
positive.code:   static const CompileTimeErrorCode FINAL_NOT_INITIALIZED_CONSTRUCTOR_3_PLUS =
        CompileTimeErrorCodeWithUniqueName(
            'FINAL_NOT_INITIALIZED_CONSTRUCTOR',
            'CompileTimeErrorCode.FINAL_NOT_INITIALIZED_CONSTRUCTOR_3',
            "All final variables must be initialized, but '{0}', '{1}', and {2} "
                "others aren't.",
            correction: "Try adding initializers for the fields.",
  
negative.code:   static const CompileTimeErrorCode FINAL_NOT_INITIALIZED_CONSTRUCTOR_1 =
        CompileTimeErrorCodeWithUniqueName(
            'FINAL_NOT_INITIALIZED_CONSTRUCTOR',
            'FINAL_NOT_INITIALIZED_CONSTRUCTOR_1',
            "All final variables must be initialized, but '{0}' isn't.",
            correction: "Try adding an initializer for the field.",
            hasPublishedDocs: true);
  