: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Nextend\Framework\Application;
use Nextend\Framework\Pattern\SingletonTrait;
use Nextend\Framework\Plugin;
abstract class AbstractApplication {
protected function init() {
//PluggableApplication\Nextend\SmartSlider3\Application\ApplicationSmartSlider3
Plugin::doAction('PluggableApplication\\' . get_class($this), array($this));
public function getKey() {
public function enqueueAssets() {