How is the kernel connected to the module?

Question

1C-Bitrix

I do event handling in my module, but I can't use the Bitrix API methods, it gives the following error:
Class 'Redmarketing\Robotats\EventHandlers\CModule' not found (0)
connected the prologue, but it doesn't help.
<?
namespace Redmarketing\Robotats\EventHandlers;
use Bitrix\Main\Localization;
use Bitrix\Main\Config\Option;
Localization\Loc::loadMessages(__FILE__);
require_once($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");
class OnSaleStatusOrderHandler{
static public function handler($ID, $val){
// swears at this
line CModule::includeModule("sale");
$db_props = CSaleOrderPropsValue::GetOrderProps($ID);

Answer 1

\CModule::includeModule("sale"); or \Bitrix\Main\Loader::includeModule('sale');