FluentDOM\Query::getNamesList PHP Method

    private function getNamesList($names)
    {
        $attributes = NULL;
        if (is_array($names)) {
            $attributes = $names;
        } elseif (is_string($names) && $names !== '*' && $names !== '') {
            $attributes = array($names);
        } elseif (isset($names) && $names !== '*') {
            throw new \InvalidArgumentException();
        }
        return $attributes;
    }