code: public function detach(EventManagerInterface $events)
      {
          foreach ($this->listeners as $index => $listener) {
              if ($events->detach($listener)) {
                  unset($this->listeners[$index]);
              }
          }
          /* @var SharedEventManager $sharedEvents */
          $sharedEvents = $events->getSharedManager();
          foreach ($this->sharedListeners as $index => $listener) {
              if ($sharedEvents->detach($listener)) {
                  unset($this->sharedListeners[$index]);
              }
          }
      }
docs: Detach all our listeners from the event manager
  
  @param  EventManagerInterface $events
  @return void