Ouzo\Utilities\Strings::appendSuffix PHP Method

    public static function appendSuffix($string, $suffix = '')
    {
        if (is_null($string)) {
            return null;
        }
        return $string . $suffix;
    }

 public function getClassName()
 {
     $class = Strings::underscoreToCamelCase($this->controller);
     if (Strings::endsWith($class, 'Controller')) {
         return $class;
     }
     return Strings::appendSuffix($class, 'Controller');
 }