private function getColumnsFillable (array $columns, bool $translations = false)
    {
        $names = [];

        foreach ($columns as $column) {
            if ($translations) {
                if (!in_array ($column->Field, $this->getTranslationsAutoFill ()))
                    array_push ($names, $column->Field);
            } else
                if (!in_array ($column->Field, $this->getAutoFill ()))
                    array_push ($names, $column->Field);
        }

        return '[\'' . implode ('\', \'', $names) . '\']';
    }