Zend\Mvc\MvcEvent::setApplication PHP Method

    public function setApplication(ApplicationInterface $application)
    {
        $this->setParam('application', $application);
        $this->application = $application;
        return $this;
    }

 public function bootstrap()
 {
     $event = new MvcEvent();
     $event->setApplication($this);
     $event->setTarget($this);
     $this->getEventManager()->trigger(MvcEvent::EVENT_BOOTSTRAP, $event);
 }