public function getFieldValue($fieldDefIdentifier, $languageCode = null)
{
if (null === $languageCode) {
$languageCode = $this->versionInfo->contentInfo->mainLanguageCode;
}
if (isset($this->fields[$fieldDefIdentifier][$languageCode])) {
return $this->fields[$fieldDefIdentifier][$languageCode]->value;
}
return null;
}