public function testWhenStartedTwiceThroughApiMustReturnSameFile()
 {
     $manager = new TraceManager();
     $file1 = $manager->start();
     $file2 = $manager->start();
     $this->assertEquals($file1, $file2);
     $manager->stop();
 }
 /**
  * {@inheritdoc}
  */
 public function stop()
 {
     parent::stop();
     $this->traceManager->stop();
 }