public function getSearchableFieldMap()
{
$cache = $this->cache->getItem('searchableFieldMap');
$fieldMap = $cache->get();
if ($cache->isMiss()) {
$this->logger->logCall(__METHOD__);
$fieldMap = $this->persistenceHandler->contentTypeHandler()->getSearchableFieldMap();
$cache->set($fieldMap)->save();
}
return $fieldMap;
}