public function __construct(Tracker_Artifact $artifact, EventManager $event_manager)
 {
     parent::__construct($artifact->getTracker(), $event_manager);
     $this->artifact = $artifact;
     $this->redirect->query_parameters = array('aid' => $this->artifact->getId(), 'func' => 'artifact-update');
 }
 public function __construct(Tracker $tracker, EventManager $event_manager)
 {
     parent::__construct($tracker, $event_manager);
     $this->redirect->query_parameters = array('tracker' => $this->tracker->getId(), 'func' => 'submit-artifact');
 }