exists() public method

public exists ( $id, $parentId = null )
 /**
  * @test
  * @testdox Synchronizer replaces value references
  */
 public function synchronizerReplacesValueReferences()
 {
     $post = EntityUtils::preparePost();
     $optionToSynchronize = [['vp_id' => 'site_icon', 'parent' => null]];
     $postToSynchronize = [['vp_id' => $post['vp_id'], 'parent' => null]];
     $previousSiteIcon = $this->storage->exists('site_icon') ? $this->storage->loadEntity('site_icon') : '';
     $this->postStorage->save($post);
     $option = EntityUtils::prepareOption('site_icon', $post['vp_id']);
     $this->storage->save($option);
     $this->postsSynchronizer->synchronize(Synchronizer::SYNCHRONIZE_EVERYTHING, $postToSynchronize);
     $this->synchronizer->synchronize(Synchronizer::SYNCHRONIZE_EVERYTHING, $optionToSynchronize);
     DBAsserter::assertFilesEqualDatabase();
     // cleanup
     if ($previousSiteIcon) {
         if (!isset($previousSiteIcon['option_value'])) {
             $previousSiteIcon['option_value'] = false;
         }
         $this->storage->save($previousSiteIcon);
     } else {
         $this->storage->delete($option);
     }
     $this->postStorage->delete($post);
     $this->synchronizer->reset();
     $this->postsSynchronizer->reset();
     $this->synchronizer->synchronize(Synchronizer::SYNCHRONIZE_EVERYTHING, $optionToSynchronize);
     $this->postsSynchronizer->synchronize(Synchronizer::SYNCHRONIZE_EVERYTHING, $postToSynchronize);
 }