Piwik\DataTable\Renderer\Xml::getTagStartAndEndFor PHP Method

    private function getTagStartAndEndFor($keyName, $columnsHaveInvalidChars)
    {
        if ($columnsHaveInvalidChars) {
            $tagStart = "col name=\"" . self::formatValueXml($keyName) . "\"";
            $tagEnd = "col";
        } else {
            $tagStart = $tagEnd = $keyName;
        }
        return array($tagStart, $tagEnd);
    }