private function getComponentXml(array $components)
    {
        $componentXml = '';
        foreach ($components as $component) {
            $componentXml .= $component->asXml();
        }
        return $componentXml;
    }
private function getComponentXml(array $components)
    {
        $componentXml = '';
        foreach ($components as $component) {
            $componentXml .= $component->asXml();
        }
        return $componentXml;
    }
private function getComponentXml ( array $ components ) { $ componentXml = '' ; foreach ( $ components as $ component ) { $ componentXml .= $ component -> asXml ( ) ; } return $ componentXml ; }
Return fonts, fills, borders, xfs xml strings.

@param Component[] $components
@return string
Return fonts fills borders xfs xml strings .