anchor.diff:      HintCode.USE_OF_VOID_RESULT,
       HintCode.FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE,
       HintCode.FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE,
  -    HintCode.NULL_AWARE_IN_CONDITION,
       HintCode.PACKAGE_IMPORT_CONTAINS_DOT_DOT,
       HtmlErrorCode.PARSE_ERROR,
       HtmlWarningCode.INVALID_URI,
  
positive.code:     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_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,
  
negative.code:     CompileTimeErrorCode.YIELD_EACH_IN_NON_GENERATOR,
      CompileTimeErrorCode.YIELD_IN_NON_GENERATOR,
      HintCode.ARGUMENT_TYPE_NOT_ASSIGNABLE,
      HintCode.CAN_BE_NULL_AFTER_NULL_AWARE,
      HintCode.DEAD_CODE,
      HintCode.DEAD_CODE_CATCH_FOLLOWING_CATCH,
      HintCode.DEAD_CODE_ON_CATCH_SUBTYPE,
  