Doctrine\DBAL\Connection::getConfiguration PHP Method

    public function getConfiguration()
    {
        return $this->_config;
    }

 private function singleImport($config, OutputInterface &$output, $entity_key = null)
 {
     $this->connection = $this->connectionFactory->createConnection($config['database']);
     $this->connection->getConfiguration()->getSQLLogger(null);
     if ($entity_key) {
         if (!isset($config['maps'][$entity_key])) {
             throw new \Exception("Entity alias not found: " . $entity_key);
         }
         $map = $config['maps'][$entity_key];
         if (!$this->container->has($map['old_data']['service_id'])) {
             throw new \Exception("Service not exists: " . $map['old_data']['service_id']);
         }
         $result = $this->importEntity($map);
         $output->writeln("<info>Total " . count($result) . " {$entity_key} imported </info>");
     } else {
         foreach ((array) $config['maps'] as $key => $map) {
             if (!$this->container->has($map['old_data']['service_id'])) {
                 throw new \Exception("Service not exists: " . $map['old_data']['service_id']);
             }
             $offset = 0;
             do {
                 $result = $this->importEntity($map);
                 $output->writeln("<info>Total " . count($result) . " {$key} imported </info>");
                 if (!$result) {
                     break;
                 }
                 $offset++;
                 $this->setOffset($offset);
             } while (true);
         }
     }
     $this->connection->close();
 }