/**
  * {@inheritDoc}
  */
 protected function execute(InputInterface $input, OutputInterface $output)
 {
     $force = $input->getOption('force');
     $only = $input->getOption('only');
     foreach ($this->synchronizerRegistry->getObjectclasses() as $objectclass) {
         if ($only && !in_array($objectclass, $only)) {
             $this->logger->debug("Skipping Synchronizer for object class {$objectclass}");
             continue;
         }
         $this->logger->debug('Use Synchronizer for object class ' . $objectclass);
         $this->synchronizerRegistry->getSynchronizer($objectclass)->synchronize($objectclass, $force);
     }
 }