How to access the plugin event in Joomla 4

Question

plugin code

defined( '_JEXEC' ) or die;

use Joomla\CMS\Plugin\CMSPlugin;
use Joomla\CMS\Event\Event;
use Joomla\Event\SubscriberInterface;

class PlgMygroupMyplugin extends CMSPlugin //implements SubscriberInterface
{
    
protected $autoloadLanguage = true;

protected $app;

//public static function getSubscribedEvents(): array
//{
//  return [
//      'getMyevent' => 'getMyevent',
//  ];
//}

/*
*
*/
public static function getMyevent()
{
    return 'OK!';
}
}

I try to call in different ways all unsuccessfully

protected function getOptions()
    {
    
    PluginHelper::importPlugin('mygroup');
    
    $results = Factory::getApplication()->triggerEvent('getMyevent');
    
    
    //$dispatcher = JDispatcher::getInstance();
    //$results = $dispatcher->trigger( 'getMyevent' );
    
    
    //$dispatcher = Joomla\CMS\Factory::getApplication()->getDispatcher();
    //$event      = new Joomla\Event\Event('getMyevent');
    //$results    = $dispatcher->dispatch('getMyevent', $event);
    
    
    //$dispatcher = Factory::getApplication()->getDispatcher();
    //$event = AbstractEvent::create('getMyevent', array());
    //$results = $dispatcher->dispatch('getMyevent', $event);

print_r($results);
}

Answer 1

The problem is that most likely all events should start with "on" when a different prefix is specified, as in my case the "get" event simply does not fire. I changed the prefix to "on" and it worked.

use Joomla\CMS\Plugin\PluginHelper;
use Joomla\CMS\Factory;

PluginHelper::importPlugin('mygroup');
$results = Factory::getApplication()->triggerEvent('onMyevent');

The solution is found on this page issues.joomla.org