anchor.diff:      StaticWarningCode.INSTANCE_METHOD_NAME_COLLIDES_WITH_SUPERCLASS_STATIC,
       StaticWarningCode.INVALID_GETTER_OVERRIDE_RETURN_TYPE,
       StaticWarningCode.INVALID_METHOD_OVERRIDE_NAMED_PARAM_TYPE,
  +    StaticWarningCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETERS,
  +    StaticWarningCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETER_BOUND,
       StaticWarningCode.INVALID_METHOD_OVERRIDE_NORMAL_PARAM_TYPE,
       StaticWarningCode.INVALID_METHOD_OVERRIDE_OPTIONAL_PARAM_TYPE,
       StaticWarningCode.INVALID_METHOD_OVERRIDE_RETURN_TYPE,
  -    StaticWarningCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETER_BOUND,
  -    StaticWarningCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETERS,
       StaticWarningCode.INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED,
       StaticWarningCode.INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL,
       StaticWarningCode.INVALID_OVERRIDE_NAMED,
  
positive.code:     CompileTimeErrorCode.YIELD_EACH_IN_NON_GENERATOR,
      CompileTimeErrorCode.YIELD_IN_NON_GENERATOR,
      HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE,
      HintCode.DEAD_CODE,
      HintCode.DEAD_CODE_CATCH_FOLLOWING_CATCH,
      HintCode.DEAD_CODE_ON_CATCH_SUBTYPE,
  
negative.code:     HintCode.UNDEFINED_OPERATOR,
      HintCode.UNDEFINED_SETTER,
      HintCode.UNNECESSARY_CAST,
      HintCode.UNNECESSARY_NO_SUCH_METHOD,
      HintCode.UNNECESSARY_TYPE_CHECK_FALSE,
      HintCode.UNNECESSARY_TYPE_CHECK_TRUE,
      HintCode.UNUSED_ELEMENT,
  