/**
* Save value to XML
*
* @param ConfigInstance $config
* @param string $xpath
* @param string $value
* @return $this
*/
public function setValueToXml(ConfigInstance $config, $xpath, $value)
{
if (null === $value) {
$nodeValue = $config->xpath($xpath);
/** @var ConfigInstance $nodeValue */
$nodeValue = $nodeValue ? $nodeValue[0] : null;
if ($nodeValue) {
$this->removeNode($config, $xpath);
}
} else {
$this->getXmlMerger()->merge($config, $this->getXmlUpdate($xpath, $value));
}
return $this;
}
