Method registerListener

/**
 * Registers a proper event listener, i.e. a method which accepts an AbstractEvent as its sole argument. This is the
 * preferred way to implement plugins in Joomla! 4.x and will be the only possible method with Joomla! 5.x onwards.
 *
 * @param   string  $methodName  The method name to register
 *
 * @return  void
 *
 * @since   4.0.0
 */
protected final function registerListener(string $methodName)
{
    $this->getDispatcher()->addListener($methodName, [$this, $methodName]);
}