private function setupSqliteConnection()
 {
     $this->doctrineHelper->setup(['driver' => 'pdo_sqlite', 'memory' => true]);
     $this->doctrineHelper->addSqliteFunctions();
 }
 private function getEntityManager()
 {
     static $entityManager = null;
     if ($entityManager === null) {
         $cacheDriver = $this->getCacheDriver();
         $doctrineHelper = new DoctrineHelper($cacheDriver);
         $doctrineHelper->setup(['driver' => 'pdo_sqlite', 'path' => storage_path() . '/db.sqlite']);
         $doctrineHelper->addSqliteFunctions();
         $entityManager = $doctrineHelper->getEntityManager();
     }
     return $entityManager;
 }