GraphQL\Validator\Rules\KnownArgumentNames::unknownArgMessage PHP Метод

    public static function unknownArgMessage($argName, $fieldName, $type)
    {
        return "Unknown argument \"{$argName}\" on field \"{$fieldName}\" of type \"{$type}\".";
    }

 private function unknownArg($argName, $fieldName, $typeName, $line, $column)
 {
     return FormattedError::create(KnownArgumentNames::unknownArgMessage($argName, $fieldName, $typeName), [new SourceLocation($line, $column)]);
 }