GraphQL\Validator\Rules\ProvidedNonNullArguments::missingDirectiveArgMessage PHP Метод

    static function missingDirectiveArgMessage($directiveName, $argName, $type)
    {
        return "Directive \"@{$directiveName}\" argument \"{$argName}\" of type \"{$type}\" is required but not provided.";
    }

 private function missingDirectiveArg($directiveName, $argName, $typeName, $line, $column)
 {
     return FormattedError::create(ProvidedNonNullArguments::missingDirectiveArgMessage($directiveName, $argName, $typeName), [new SourceLocation($line, $column)]);
 }