/**
  * {@inheritDoc}
  * 
  * @see PHPUnit_Framework_TestCase::tearDownAfterClass()
  * 
  * @uses KernelTestCase::ensureKernelShutdown()
  */
 public static function tearDownAfterClass()
 {
     parent::ensureKernelShutdown();
     static::$repository->clear();
     static::$repository = null;
     // avoid memory leaks
 }