/**
* Create the LibGuides backend.
*
* @param Connector $connector Connector
*
* @return Backend
*/
protected function createBackend(Connector $connector)
{
$defaultSearch = isset($this->libGuidesConfig->General->defaultSearch) ? $this->libGuidesConfig->General->defaultSearch : null;
$backend = new Backend($connector, $this->createRecordCollectionFactory(), $defaultSearch);
$backend->setLogger($this->logger);
$backend->setQueryBuilder($this->createQueryBuilder());
return $backend;
}