/**
* @param string $eventName
*
* @return ContainerMediatorInterface Fluent Interface
* @throws \InvalidArgumentException
*/
private function sortServiceListeners(string $eventName) : ContainerMediatorInterface
{
if (0 === count($this->serviceListeners)) {
return $this;
}
if ('' !== $eventName) {
if (!array_key_exists($eventName, $this->serviceListeners)) {
return $this;
}
$eventNames = [$eventName];
} else {
ksort($this->serviceListeners);
$eventNames = array_keys(parent::getListeners(''));
}
foreach ($eventNames as $anEvent) {
krsort($this->serviceListeners[$anEvent], SORT_NUMERIC);
}
return $this;
}