BasketBuilderCrm::initBasket

public function initBasket()
{
	$this->formData = $this->builder->getFormData();
	$orderId = $this->formData['ID'];
	$this->delegate = $this->getDelegate($orderId);
	if ((int)$orderId > 0)
	{
		$changedProducts = $this->formData['PRODUCT'];
		$basket = $this->getBasket();
		/** @var \Bitrix\Sale\BasketItem $basketItem */
		foreach ($basket as $basketItem)
		{
			$basketItemId = $basketItem->getBasketCode();
			if (is_array($this->formData['DELETED_PRODUCT_IDS']) && in_array($basketItemId, $this->formData['DELETED_PRODUCT_IDS']))
			{
				continue;
			}
			if (!isset($changedProducts[$basketItemId]))
			{
				$changedProducts[$basketItemId] = $basketItem->getFieldValues();
				$changedProducts[$basketItemId]['OFFER_ID'] = $changedProducts[$basketItemId]['PRODUCT_ID'];
			}
		}
		$this->formData['PRODUCT'] = $changedProducts;
	}
	\Bitrix\Sale\ProviderBase::setUsingTrustData(true);
	return $this;
}