public function getAllContentClasses()
    {
        $deliveryContentSuperClass = new core_kernel_classes_Class(DeliveryContent::CLASS_URI);
        $subclasses = $deliveryContentSuperClass->getSubClasses(true);
        return $subclasses;
    }
public function getAllContentClasses()
    {
        $deliveryContentSuperClass = new core_kernel_classes_Class(DeliveryContent::CLASS_URI);
        $subclasses = $deliveryContentSuperClass->getSubClasses(true);
        return $subclasses;
    }
public function getAllContentClasses ( ) { $ deliveryContentSuperClass = new core_kernel_classes_Class ( DeliveryContent :: CLASS_URI ) ; $ subclasses = $ deliveryContentSuperClass -> getSubClasses ( true ) ; return $ subclasses ; }
Returns all the content classes

@return array
Returns all the content classes