From 3467488060ceebaee770b69a10f1499d31ce86c4 Mon Sep 17 00:00:00 2001
From: Nadiya Syvokonenko <nsyvokonenko@magento.com>
Date: Tue, 5 Jul 2016 14:26:01 +0300
Subject: [PATCH] MAGETWO-50026: [Github] SalesInvoiceRepository attributes not
 correctly type cast #3605

---
 .../Sales/Api/Data/CreditmemoInterface.php    |   8 +-
 .../Api/Data/CreditmemoItemInterface.php      |   6 +-
 .../Sales/Api/Data/InvoiceInterface.php       |   8 +-
 .../Sales/Api/Data/InvoiceItemInterface.php   |   4 +-
 .../Magento/Sales/Api/Data/OrderInterface.php |  16 +-
 .../Sales/Api/Data/OrderItemInterface.php     |  14 +-
 .../Magento/Sales/Api/Data/TotalInterface.php |   4 +-
 app/code/Magento/Sales/Model/Order.php        | 258 +++++++++---------
 .../Magento/Sales/Model/Order/Creditmemo.php  |   9 +-
 .../Sales/Model/Order/Creditmemo/Item.php     |  56 ++--
 .../Magento/Sales/Model/Order/Invoice.php     |  82 +++---
 .../Sales/Model/Order/Invoice/Item.php        |  40 +--
 app/code/Magento/Sales/Model/Order/Item.php   | 182 ++++++------
 13 files changed, 343 insertions(+), 344 deletions(-)

diff --git a/app/code/Magento/Sales/Api/Data/CreditmemoInterface.php b/app/code/Magento/Sales/Api/Data/CreditmemoInterface.php
index 6b2548da10559..ecca646c69df9 100644
--- a/app/code/Magento/Sales/Api/Data/CreditmemoInterface.php
+++ b/app/code/Magento/Sales/Api/Data/CreditmemoInterface.php
@@ -304,7 +304,7 @@ public function getBaseGrandTotal();
     /**
      * Gets the credit memo base discount tax compensation amount.
      *
-     * @return float Credit memo base discount tax compensation amount.
+     * @return float|null Credit memo base discount tax compensation amount.
      */
     public function getBaseDiscountTaxCompensationAmount();
 
@@ -318,7 +318,7 @@ public function getBaseShippingAmount();
     /**
      * Gets the credit memo base shipping discount tax compensation amount.
      *
-     * @return float Credit memo base shipping discount tax compensation amount.
+     * @return float|null Credit memo base shipping discount tax compensation amount.
      */
     public function getBaseShippingDiscountTaxCompensationAmnt();
 
@@ -453,7 +453,7 @@ public function getGrandTotal();
     /**
      * Gets the credit memo discount tax compensation amount.
      *
-     * @return float Credit memo discount tax compensation amount.
+     * @return float|null Credit memo discount tax compensation amount.
      */
     public function getDiscountTaxCompensationAmount();
 
@@ -501,7 +501,7 @@ public function getShippingAmount();
     /**
      * Gets the credit memo shipping discount tax compensation amount.
      *
-     * @return float Credit memo shipping discount tax compensation amount.
+     * @return float|null Credit memo shipping discount tax compensation amount.
      */
     public function getShippingDiscountTaxCompensationAmount();
 
diff --git a/app/code/Magento/Sales/Api/Data/CreditmemoItemInterface.php b/app/code/Magento/Sales/Api/Data/CreditmemoItemInterface.php
index 20c5051ac493a..8481a3426d0d8 100644
--- a/app/code/Magento/Sales/Api/Data/CreditmemoItemInterface.php
+++ b/app/code/Magento/Sales/Api/Data/CreditmemoItemInterface.php
@@ -169,14 +169,14 @@ public function getBaseCost();
     /**
      * Gets the base discount amount for a credit memo item.
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountAmount();
 
     /**
      * Gets the base discount tax compensation amount for a credit memo item.
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount();
 
@@ -275,7 +275,7 @@ public function setEntityId($entityId);
     /**
      * Gets the discount tax compensation amount for a credit memo item.
      *
-     * @return float Discount tax compensation amount.
+     * @return float|null Discount tax compensation amount.
      */
     public function getDiscountTaxCompensationAmount();
 
diff --git a/app/code/Magento/Sales/Api/Data/InvoiceInterface.php b/app/code/Magento/Sales/Api/Data/InvoiceInterface.php
index c2fc2937daddf..77dfed277a262 100644
--- a/app/code/Magento/Sales/Api/Data/InvoiceInterface.php
+++ b/app/code/Magento/Sales/Api/Data/InvoiceInterface.php
@@ -225,7 +225,7 @@ public function getBaseGrandTotal();
     /**
      * Gets the base discount tax compensation amount for the invoice.
      *
-     * @return float Base discount tax compensation amount.
+     * @return float|null Base discount tax compensation amount.
      */
     public function getBaseDiscountTaxCompensationAmount();
 
@@ -239,7 +239,7 @@ public function getBaseShippingAmount();
     /**
      * Gets the base shipping discount tax compensation amount for the invoice.
      *
-     * @return float Base shipping discount tax compensation amount.
+     * @return float|null Base shipping discount tax compensation amount.
      */
     public function getBaseShippingDiscountTaxCompensationAmnt();
 
@@ -381,7 +381,7 @@ public function getGrandTotal();
     /**
      * Gets the discount tax compensation amount for the invoice.
      *
-     * @return float Discount tax compensation amount.
+     * @return float|null Discount tax compensation amount.
      */
     public function getDiscountTaxCompensationAmount();
 
@@ -430,7 +430,7 @@ public function getShippingAmount();
     /**
      * Gets the shipping discount tax compensation amount for the invoice.
      *
-     * @return float Shipping discount tax compensation amount.
+     * @return float|null Shipping discount tax compensation amount.
      */
     public function getShippingDiscountTaxCompensationAmount();
 
diff --git a/app/code/Magento/Sales/Api/Data/InvoiceItemInterface.php b/app/code/Magento/Sales/Api/Data/InvoiceItemInterface.php
index 9e1addbdcae7b..e76f644a8275f 100644
--- a/app/code/Magento/Sales/Api/Data/InvoiceItemInterface.php
+++ b/app/code/Magento/Sales/Api/Data/InvoiceItemInterface.php
@@ -140,7 +140,7 @@ public function getBaseDiscountAmount();
     /**
      * Gets the base discount tax compensation amount for the invoice item.
      *
-     * @return float Base discount tax compensation amount.
+     * @return float|null Base discount tax compensation amount.
      */
     public function getBaseDiscountTaxCompensationAmount();
 
@@ -211,7 +211,7 @@ public function setEntityId($entityId);
     /**
      * Gets the discount tax compensation amount for the invoice item.
      *
-     * @return float Discount tax compensation amount.
+     * @return float|null Discount tax compensation amount.
      */
     public function getDiscountTaxCompensationAmount();
 
diff --git a/app/code/Magento/Sales/Api/Data/OrderInterface.php b/app/code/Magento/Sales/Api/Data/OrderInterface.php
index d494f869f1dff..67152d152272c 100644
--- a/app/code/Magento/Sales/Api/Data/OrderInterface.php
+++ b/app/code/Magento/Sales/Api/Data/OrderInterface.php
@@ -643,21 +643,21 @@ public function getBaseGrandTotal();
     /**
      * Gets the base discount tax compensation amount for the order.
      *
-     * @return float Base discount tax compensation amount.
+     * @return float|null Base discount tax compensation amount.
      */
     public function getBaseDiscountTaxCompensationAmount();
 
     /**
      * Gets the base discount tax compensation invoiced amount for the order.
      *
-     * @return float Base discount tax compensation invoiced.
+     * @return float|null Base discount tax compensation invoiced.
      */
     public function getBaseDiscountTaxCompensationInvoiced();
 
     /**
      * Gets the base discount tax compensation refunded amount for the order.
      *
-     * @return float Base discount tax compensation refunded.
+     * @return float|null Base discount tax compensation refunded.
      */
     public function getBaseDiscountTaxCompensationRefunded();
 
@@ -685,7 +685,7 @@ public function getBaseShippingDiscountAmount();
     /**
      * Gets the base shipping discount tax compensation amount for the order.
      *
-     * @return float Base shipping discount tax compensation amount.
+     * @return float|null Base shipping discount tax compensation amount.
      */
     public function getBaseShippingDiscountTaxCompensationAmnt();
 
@@ -1107,21 +1107,21 @@ public function getGrandTotal();
     /**
      * Gets the discount tax compensation amount for the order.
      *
-     * @return float Discount tax compensation amount.
+     * @return float|null Discount tax compensation amount.
      */
     public function getDiscountTaxCompensationAmount();
 
     /**
      * Gets the discount tax compensation invoiced amount for the order.
      *
-     * @return float Discount tax compensation invoiced amount.
+     * @return float|null Discount tax compensation invoiced amount.
      */
     public function getDiscountTaxCompensationInvoiced();
 
     /**
      * Gets the discount tax compensation refunded amount for the order.
      *
-     * @return float Discount tax compensation refunded amount.
+     * @return float|null Discount tax compensation refunded amount.
      */
     public function getDiscountTaxCompensationRefunded();
 
@@ -1268,7 +1268,7 @@ public function getShippingDiscountAmount();
     /**
      * Gets the shipping discount tax compensation amount for the order.
      *
-     * @return float Shipping discount tax compensation amount.
+     * @return float|null Shipping discount tax compensation amount.
      */
     public function getShippingDiscountTaxCompensationAmount();
 
diff --git a/app/code/Magento/Sales/Api/Data/OrderItemInterface.php b/app/code/Magento/Sales/Api/Data/OrderItemInterface.php
index a9efe1f3b15be..298276b7e132a 100644
--- a/app/code/Magento/Sales/Api/Data/OrderItemInterface.php
+++ b/app/code/Magento/Sales/Api/Data/OrderItemInterface.php
@@ -457,21 +457,21 @@ public function getBaseDiscountRefunded();
     /**
      * Gets the base discount tax compensation amount for the order item.
      *
-     * @return float Base discount tax compensation amount.
+     * @return float|null Base discount tax compensation amount.
      */
     public function getBaseDiscountTaxCompensationAmount();
 
     /**
      * Gets the base discount tax compensation invoiced for the order item.
      *
-     * @return float Base discount tax compensation invoiced.
+     * @return float|null Base discount tax compensation invoiced.
      */
     public function getBaseDiscountTaxCompensationInvoiced();
 
     /**
      * Gets the base discount tax compensation refunded for the order item.
      *
-     * @return float Base discount tax compensation refunded.
+     * @return float|null Base discount tax compensation refunded.
      */
     public function getBaseDiscountTaxCompensationRefunded();
 
@@ -738,28 +738,28 @@ public function getGwTaxAmountRefunded();
     /**
      * Gets the discount tax compensation amount for the order item.
      *
-     * @return float Discount tax compensation amount.
+     * @return float|null Discount tax compensation amount.
      */
     public function getDiscountTaxCompensationAmount();
 
     /**
      * Gets the discount tax compensation canceled for the order item.
      *
-     * @return float Discount tax compensation canceled.
+     * @return float|null Discount tax compensation canceled.
      */
     public function getDiscountTaxCompensationCanceled();
 
     /**
      * Gets the discount tax compensation invoiced for the order item.
      *
-     * @return float Discount tax compensation invoiced.
+     * @return float|null Discount tax compensation invoiced.
      */
     public function getDiscountTaxCompensationInvoiced();
 
     /**
      * Gets the discount tax compensation refunded for the order item.
      *
-     * @return float Discount tax compensation refunded.
+     * @return float|null Discount tax compensation refunded.
      */
     public function getDiscountTaxCompensationRefunded();
 
diff --git a/app/code/Magento/Sales/Api/Data/TotalInterface.php b/app/code/Magento/Sales/Api/Data/TotalInterface.php
index 1211b06fa3fed..e83720c7bb472 100644
--- a/app/code/Magento/Sales/Api/Data/TotalInterface.php
+++ b/app/code/Magento/Sales/Api/Data/TotalInterface.php
@@ -114,7 +114,7 @@ public function getBaseShippingDiscountAmount();
     /**
      * Gets the base shipping discount tax compensation amount.
      *
-     * @return float Base shipping discount tax compensation amount.
+     * @return float|null Base shipping discount tax compensation amount.
      */
     public function getBaseShippingDiscountTaxCompensationAmnt();
 
@@ -177,7 +177,7 @@ public function getShippingDiscountAmount();
     /**
      * Gets the shipping discount tax compensation amount.
      *
-     * @return float Shipping discount tax compensation amount.
+     * @return float|null Shipping discount tax compensation amount.
      */
     public function getShippingDiscountTaxCompensationAmount();
 
diff --git a/app/code/Magento/Sales/Model/Order.php b/app/code/Magento/Sales/Model/Order.php
index 7ed85998bf520..bee30355e69e5 100644
--- a/app/code/Magento/Sales/Model/Order.php
+++ b/app/code/Magento/Sales/Model/Order.php
@@ -937,7 +937,7 @@ public function setShippingAddress(\Magento\Sales\Api\Data\OrderAddressInterface
     /**
      * Retrieve order billing address
      *
-     * @return \Magento\Sales\Model\Order\Address|null
+     * @return \Magento\Sales\Api\Data\OrderAddressInterface|null
      */
     public function getBillingAddress()
     {
@@ -1638,7 +1638,7 @@ public function isCurrencyDifferent()
     /**
      * Retrieve order total due value
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalDue()
     {
@@ -1650,7 +1650,7 @@ public function getTotalDue()
     /**
      * Retrieve order total due value
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalDue()
     {
@@ -1969,7 +1969,7 @@ public function getAddresses()
     }
 
     /**
-     * @return \Magento\Sales\Api\Data\OrderStatusHistoryInterface[]
+     * @return \Magento\Sales\Api\Data\OrderStatusHistoryInterface[]|null
      */
     public function getStatusHistories()
     {
@@ -2007,7 +2007,7 @@ public function setExtensionAttributes(\Magento\Sales\Api\Data\OrderExtensionInt
     /**
      * Returns adjustment_negative
      *
-     * @return float
+     * @return float|null
      */
     public function getAdjustmentNegative()
     {
@@ -2017,7 +2017,7 @@ public function getAdjustmentNegative()
     /**
      * Returns adjustment_positive
      *
-     * @return float
+     * @return float|null
      */
     public function getAdjustmentPositive()
     {
@@ -2027,7 +2027,7 @@ public function getAdjustmentPositive()
     /**
      * Returns applied_rule_ids
      *
-     * @return string
+     * @return string|null
      */
     public function getAppliedRuleIds()
     {
@@ -2037,7 +2037,7 @@ public function getAppliedRuleIds()
     /**
      * Returns base_adjustment_negative
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseAdjustmentNegative()
     {
@@ -2047,7 +2047,7 @@ public function getBaseAdjustmentNegative()
     /**
      * Returns base_adjustment_positive
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseAdjustmentPositive()
     {
@@ -2057,7 +2057,7 @@ public function getBaseAdjustmentPositive()
     /**
      * Returns base_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getBaseCurrencyCode()
     {
@@ -2067,7 +2067,7 @@ public function getBaseCurrencyCode()
     /**
      * Returns base_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountAmount()
     {
@@ -2077,7 +2077,7 @@ public function getBaseDiscountAmount()
     /**
      * Returns base_discount_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountCanceled()
     {
@@ -2087,7 +2087,7 @@ public function getBaseDiscountCanceled()
     /**
      * Returns base_discount_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountInvoiced()
     {
@@ -2097,7 +2097,7 @@ public function getBaseDiscountInvoiced()
     /**
      * Returns base_discount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountRefunded()
     {
@@ -2117,7 +2117,7 @@ public function getBaseGrandTotal()
     /**
      * Returns base_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount()
     {
@@ -2127,7 +2127,7 @@ public function getBaseDiscountTaxCompensationAmount()
     /**
      * Returns base_discount_tax_compensation_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationInvoiced()
     {
@@ -2137,7 +2137,7 @@ public function getBaseDiscountTaxCompensationInvoiced()
     /**
      * Returns base_discount_tax_compensation_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationRefunded()
     {
@@ -2147,7 +2147,7 @@ public function getBaseDiscountTaxCompensationRefunded()
     /**
      * Returns base_shipping_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingAmount()
     {
@@ -2157,7 +2157,7 @@ public function getBaseShippingAmount()
     /**
      * Returns base_shipping_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingCanceled()
     {
@@ -2167,7 +2167,7 @@ public function getBaseShippingCanceled()
     /**
      * Returns base_shipping_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingDiscountAmount()
     {
@@ -2177,7 +2177,7 @@ public function getBaseShippingDiscountAmount()
     /**
      * Returns base_shipping_discount_tax_compensation_amnt
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingDiscountTaxCompensationAmnt()
     {
@@ -2187,7 +2187,7 @@ public function getBaseShippingDiscountTaxCompensationAmnt()
     /**
      * Returns base_shipping_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingInclTax()
     {
@@ -2197,7 +2197,7 @@ public function getBaseShippingInclTax()
     /**
      * Returns base_shipping_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingInvoiced()
     {
@@ -2207,7 +2207,7 @@ public function getBaseShippingInvoiced()
     /**
      * Returns base_shipping_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingRefunded()
     {
@@ -2217,7 +2217,7 @@ public function getBaseShippingRefunded()
     /**
      * Returns base_shipping_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingTaxAmount()
     {
@@ -2227,7 +2227,7 @@ public function getBaseShippingTaxAmount()
     /**
      * Returns base_shipping_tax_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingTaxRefunded()
     {
@@ -2237,7 +2237,7 @@ public function getBaseShippingTaxRefunded()
     /**
      * Returns base_subtotal
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotal()
     {
@@ -2247,7 +2247,7 @@ public function getBaseSubtotal()
     /**
      * Returns base_subtotal_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotalCanceled()
     {
@@ -2257,7 +2257,7 @@ public function getBaseSubtotalCanceled()
     /**
      * Returns base_subtotal_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotalInclTax()
     {
@@ -2267,7 +2267,7 @@ public function getBaseSubtotalInclTax()
     /**
      * Returns base_subtotal_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotalInvoiced()
     {
@@ -2277,7 +2277,7 @@ public function getBaseSubtotalInvoiced()
     /**
      * Returns base_subtotal_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotalRefunded()
     {
@@ -2287,7 +2287,7 @@ public function getBaseSubtotalRefunded()
     /**
      * Returns base_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxAmount()
     {
@@ -2297,7 +2297,7 @@ public function getBaseTaxAmount()
     /**
      * Returns base_tax_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxCanceled()
     {
@@ -2307,7 +2307,7 @@ public function getBaseTaxCanceled()
     /**
      * Returns base_tax_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxInvoiced()
     {
@@ -2317,7 +2317,7 @@ public function getBaseTaxInvoiced()
     /**
      * Returns base_tax_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxRefunded()
     {
@@ -2327,7 +2327,7 @@ public function getBaseTaxRefunded()
     /**
      * Returns base_total_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalCanceled()
     {
@@ -2337,7 +2337,7 @@ public function getBaseTotalCanceled()
     /**
      * Returns base_total_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalInvoiced()
     {
@@ -2347,7 +2347,7 @@ public function getBaseTotalInvoiced()
     /**
      * Returns base_total_invoiced_cost
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalInvoicedCost()
     {
@@ -2357,7 +2357,7 @@ public function getBaseTotalInvoicedCost()
     /**
      * Returns base_total_offline_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalOfflineRefunded()
     {
@@ -2367,7 +2367,7 @@ public function getBaseTotalOfflineRefunded()
     /**
      * Returns base_total_online_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalOnlineRefunded()
     {
@@ -2377,7 +2377,7 @@ public function getBaseTotalOnlineRefunded()
     /**
      * Returns base_total_paid
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalPaid()
     {
@@ -2387,7 +2387,7 @@ public function getBaseTotalPaid()
     /**
      * Returns base_total_qty_ordered
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalQtyOrdered()
     {
@@ -2397,7 +2397,7 @@ public function getBaseTotalQtyOrdered()
     /**
      * Returns base_total_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalRefunded()
     {
@@ -2407,7 +2407,7 @@ public function getBaseTotalRefunded()
     /**
      * Returns base_to_global_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseToGlobalRate()
     {
@@ -2417,7 +2417,7 @@ public function getBaseToGlobalRate()
     /**
      * Returns base_to_order_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseToOrderRate()
     {
@@ -2427,7 +2427,7 @@ public function getBaseToOrderRate()
     /**
      * Returns billing_address_id
      *
-     * @return int
+     * @return int|null
      */
     public function getBillingAddressId()
     {
@@ -2437,7 +2437,7 @@ public function getBillingAddressId()
     /**
      * Returns can_ship_partially
      *
-     * @return int
+     * @return int|null
      */
     public function getCanShipPartially()
     {
@@ -2447,7 +2447,7 @@ public function getCanShipPartially()
     /**
      * Returns can_ship_partially_item
      *
-     * @return int
+     * @return int|null
      */
     public function getCanShipPartiallyItem()
     {
@@ -2457,7 +2457,7 @@ public function getCanShipPartiallyItem()
     /**
      * Returns coupon_code
      *
-     * @return string
+     * @return string|null
      */
     public function getCouponCode()
     {
@@ -2467,7 +2467,7 @@ public function getCouponCode()
     /**
      * Returns created_at
      *
-     * @return string
+     * @return string|null
      */
     public function getCreatedAt()
     {
@@ -2485,7 +2485,7 @@ public function setCreatedAt($createdAt)
     /**
      * Returns customer_dob
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerDob()
     {
@@ -2505,7 +2505,7 @@ public function getCustomerEmail()
     /**
      * Returns customer_firstname
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerFirstname()
     {
@@ -2515,7 +2515,7 @@ public function getCustomerFirstname()
     /**
      * Returns customer_gender
      *
-     * @return int
+     * @return int|null
      */
     public function getCustomerGender()
     {
@@ -2525,7 +2525,7 @@ public function getCustomerGender()
     /**
      * Returns customer_group_id
      *
-     * @return int
+     * @return int|null
      */
     public function getCustomerGroupId()
     {
@@ -2535,7 +2535,7 @@ public function getCustomerGroupId()
     /**
      * Returns customer_id
      *
-     * @return int
+     * @return int|null
      */
     public function getCustomerId()
     {
@@ -2545,7 +2545,7 @@ public function getCustomerId()
     /**
      * Returns customer_is_guest
      *
-     * @return int
+     * @return int|null
      */
     public function getCustomerIsGuest()
     {
@@ -2555,7 +2555,7 @@ public function getCustomerIsGuest()
     /**
      * Returns customer_lastname
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerLastname()
     {
@@ -2565,7 +2565,7 @@ public function getCustomerLastname()
     /**
      * Returns customer_middlename
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerMiddlename()
     {
@@ -2575,7 +2575,7 @@ public function getCustomerMiddlename()
     /**
      * Returns customer_note
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerNote()
     {
@@ -2585,7 +2585,7 @@ public function getCustomerNote()
     /**
      * Returns customer_note_notify
      *
-     * @return int
+     * @return int|null
      */
     public function getCustomerNoteNotify()
     {
@@ -2595,7 +2595,7 @@ public function getCustomerNoteNotify()
     /**
      * Returns customer_prefix
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerPrefix()
     {
@@ -2605,7 +2605,7 @@ public function getCustomerPrefix()
     /**
      * Returns customer_suffix
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerSuffix()
     {
@@ -2615,7 +2615,7 @@ public function getCustomerSuffix()
     /**
      * Returns customer_taxvat
      *
-     * @return string
+     * @return string|null
      */
     public function getCustomerTaxvat()
     {
@@ -2625,7 +2625,7 @@ public function getCustomerTaxvat()
     /**
      * Returns discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountAmount()
     {
@@ -2635,7 +2635,7 @@ public function getDiscountAmount()
     /**
      * Returns discount_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountCanceled()
     {
@@ -2645,7 +2645,7 @@ public function getDiscountCanceled()
     /**
      * Returns discount_description
      *
-     * @return string
+     * @return string|null
      */
     public function getDiscountDescription()
     {
@@ -2655,7 +2655,7 @@ public function getDiscountDescription()
     /**
      * Returns discount_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountInvoiced()
     {
@@ -2665,7 +2665,7 @@ public function getDiscountInvoiced()
     /**
      * Returns discount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountRefunded()
     {
@@ -2675,7 +2675,7 @@ public function getDiscountRefunded()
     /**
      * Returns edit_increment
      *
-     * @return int
+     * @return int|null
      */
     public function getEditIncrement()
     {
@@ -2685,7 +2685,7 @@ public function getEditIncrement()
     /**
      * Returns email_sent
      *
-     * @return int
+     * @return int|null
      */
     public function getEmailSent()
     {
@@ -2695,7 +2695,7 @@ public function getEmailSent()
     /**
      * Returns ext_customer_id
      *
-     * @return string
+     * @return string|null
      */
     public function getExtCustomerId()
     {
@@ -2705,7 +2705,7 @@ public function getExtCustomerId()
     /**
      * Returns ext_order_id
      *
-     * @return string
+     * @return string|null
      */
     public function getExtOrderId()
     {
@@ -2715,7 +2715,7 @@ public function getExtOrderId()
     /**
      * Returns forced_shipment_with_invoice
      *
-     * @return int
+     * @return int|null
      */
     public function getForcedShipmentWithInvoice()
     {
@@ -2725,7 +2725,7 @@ public function getForcedShipmentWithInvoice()
     /**
      * Returns global_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getGlobalCurrencyCode()
     {
@@ -2745,7 +2745,7 @@ public function getGrandTotal()
     /**
      * Returns discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationAmount()
     {
@@ -2755,7 +2755,7 @@ public function getDiscountTaxCompensationAmount()
     /**
      * Returns discount_tax_compensation_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationInvoiced()
     {
@@ -2765,7 +2765,7 @@ public function getDiscountTaxCompensationInvoiced()
     /**
      * Returns discount_tax_compensation_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationRefunded()
     {
@@ -2775,7 +2775,7 @@ public function getDiscountTaxCompensationRefunded()
     /**
      * Returns hold_before_state
      *
-     * @return string
+     * @return string|null
      */
     public function getHoldBeforeState()
     {
@@ -2785,7 +2785,7 @@ public function getHoldBeforeState()
     /**
      * Returns hold_before_status
      *
-     * @return string
+     * @return string|null
      */
     public function getHoldBeforeStatus()
     {
@@ -2795,7 +2795,7 @@ public function getHoldBeforeStatus()
     /**
      * Returns is_virtual
      *
-     * @return int
+     * @return int|null
      */
     public function getIsVirtual()
     {
@@ -2805,7 +2805,7 @@ public function getIsVirtual()
     /**
      * Returns order_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getOrderCurrencyCode()
     {
@@ -2815,7 +2815,7 @@ public function getOrderCurrencyCode()
     /**
      * Returns original_increment_id
      *
-     * @return string
+     * @return string|null
      */
     public function getOriginalIncrementId()
     {
@@ -2825,7 +2825,7 @@ public function getOriginalIncrementId()
     /**
      * Returns payment_authorization_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getPaymentAuthorizationAmount()
     {
@@ -2835,7 +2835,7 @@ public function getPaymentAuthorizationAmount()
     /**
      * Returns payment_auth_expiration
      *
-     * @return int
+     * @return int|null
      */
     public function getPaymentAuthExpiration()
     {
@@ -2845,7 +2845,7 @@ public function getPaymentAuthExpiration()
     /**
      * Returns protect_code
      *
-     * @return string
+     * @return string|null
      */
     public function getProtectCode()
     {
@@ -2855,7 +2855,7 @@ public function getProtectCode()
     /**
      * Returns quote_address_id
      *
-     * @return int
+     * @return int|null
      */
     public function getQuoteAddressId()
     {
@@ -2865,7 +2865,7 @@ public function getQuoteAddressId()
     /**
      * Returns quote_id
      *
-     * @return int
+     * @return int|null
      */
     public function getQuoteId()
     {
@@ -2875,7 +2875,7 @@ public function getQuoteId()
     /**
      * Returns relation_child_id
      *
-     * @return string
+     * @return string|null
      */
     public function getRelationChildId()
     {
@@ -2885,7 +2885,7 @@ public function getRelationChildId()
     /**
      * Returns relation_child_real_id
      *
-     * @return string
+     * @return string|null
      */
     public function getRelationChildRealId()
     {
@@ -2895,7 +2895,7 @@ public function getRelationChildRealId()
     /**
      * Returns relation_parent_id
      *
-     * @return string
+     * @return string|null
      */
     public function getRelationParentId()
     {
@@ -2905,7 +2905,7 @@ public function getRelationParentId()
     /**
      * Returns relation_parent_real_id
      *
-     * @return string
+     * @return string|null
      */
     public function getRelationParentRealId()
     {
@@ -2915,7 +2915,7 @@ public function getRelationParentRealId()
     /**
      * Returns remote_ip
      *
-     * @return string
+     * @return string|null
      */
     public function getRemoteIp()
     {
@@ -2925,7 +2925,7 @@ public function getRemoteIp()
     /**
      * Returns shipping_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingAmount()
     {
@@ -2935,7 +2935,7 @@ public function getShippingAmount()
     /**
      * Returns shipping_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingCanceled()
     {
@@ -2945,7 +2945,7 @@ public function getShippingCanceled()
     /**
      * Returns shipping_description
      *
-     * @return string
+     * @return string|null
      */
     public function getShippingDescription()
     {
@@ -2955,7 +2955,7 @@ public function getShippingDescription()
     /**
      * Returns shipping_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingDiscountAmount()
     {
@@ -2965,7 +2965,7 @@ public function getShippingDiscountAmount()
     /**
      * Returns shipping_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingDiscountTaxCompensationAmount()
     {
@@ -2975,7 +2975,7 @@ public function getShippingDiscountTaxCompensationAmount()
     /**
      * Returns shipping_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingInclTax()
     {
@@ -2985,7 +2985,7 @@ public function getShippingInclTax()
     /**
      * Returns shipping_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingInvoiced()
     {
@@ -2995,7 +2995,7 @@ public function getShippingInvoiced()
     /**
      * Returns shipping_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingRefunded()
     {
@@ -3005,7 +3005,7 @@ public function getShippingRefunded()
     /**
      * Returns shipping_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingTaxAmount()
     {
@@ -3015,7 +3015,7 @@ public function getShippingTaxAmount()
     /**
      * Returns shipping_tax_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingTaxRefunded()
     {
@@ -3025,7 +3025,7 @@ public function getShippingTaxRefunded()
     /**
      * Returns state
      *
-     * @return string
+     * @return string|null
      */
     public function getState()
     {
@@ -3035,7 +3035,7 @@ public function getState()
     /**
      * Returns status
      *
-     * @return string
+     * @return string|null
      */
     public function getStatus()
     {
@@ -3045,7 +3045,7 @@ public function getStatus()
     /**
      * Returns store_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getStoreCurrencyCode()
     {
@@ -3055,7 +3055,7 @@ public function getStoreCurrencyCode()
     /**
      * Returns store_id
      *
-     * @return int
+     * @return int|null
      */
     public function getStoreId()
     {
@@ -3065,7 +3065,7 @@ public function getStoreId()
     /**
      * Returns store_name
      *
-     * @return string
+     * @return string|null
      */
     public function getStoreName()
     {
@@ -3075,7 +3075,7 @@ public function getStoreName()
     /**
      * Returns store_to_base_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getStoreToBaseRate()
     {
@@ -3085,7 +3085,7 @@ public function getStoreToBaseRate()
     /**
      * Returns store_to_order_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getStoreToOrderRate()
     {
@@ -3095,7 +3095,7 @@ public function getStoreToOrderRate()
     /**
      * Returns subtotal
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotal()
     {
@@ -3105,7 +3105,7 @@ public function getSubtotal()
     /**
      * Returns subtotal_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotalCanceled()
     {
@@ -3115,7 +3115,7 @@ public function getSubtotalCanceled()
     /**
      * Returns subtotal_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotalInclTax()
     {
@@ -3125,7 +3125,7 @@ public function getSubtotalInclTax()
     /**
      * Returns subtotal_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotalInvoiced()
     {
@@ -3135,7 +3135,7 @@ public function getSubtotalInvoiced()
     /**
      * Returns subtotal_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotalRefunded()
     {
@@ -3145,7 +3145,7 @@ public function getSubtotalRefunded()
     /**
      * Returns tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxAmount()
     {
@@ -3155,7 +3155,7 @@ public function getTaxAmount()
     /**
      * Returns tax_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxCanceled()
     {
@@ -3165,7 +3165,7 @@ public function getTaxCanceled()
     /**
      * Returns tax_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxInvoiced()
     {
@@ -3175,7 +3175,7 @@ public function getTaxInvoiced()
     /**
      * Returns tax_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxRefunded()
     {
@@ -3185,7 +3185,7 @@ public function getTaxRefunded()
     /**
      * Returns total_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalCanceled()
     {
@@ -3195,7 +3195,7 @@ public function getTotalCanceled()
     /**
      * Returns total_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalInvoiced()
     {
@@ -3205,7 +3205,7 @@ public function getTotalInvoiced()
     /**
      * Returns total_item_count
      *
-     * @return int
+     * @return int|null
      */
     public function getTotalItemCount()
     {
@@ -3215,7 +3215,7 @@ public function getTotalItemCount()
     /**
      * Returns total_offline_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalOfflineRefunded()
     {
@@ -3225,7 +3225,7 @@ public function getTotalOfflineRefunded()
     /**
      * Returns total_online_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalOnlineRefunded()
     {
@@ -3235,7 +3235,7 @@ public function getTotalOnlineRefunded()
     /**
      * Returns total_paid
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalPaid()
     {
@@ -3245,7 +3245,7 @@ public function getTotalPaid()
     /**
      * Returns total_qty_ordered
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalQtyOrdered()
     {
@@ -3255,7 +3255,7 @@ public function getTotalQtyOrdered()
     /**
      * Returns total_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getTotalRefunded()
     {
@@ -3265,7 +3265,7 @@ public function getTotalRefunded()
     /**
      * Returns updated_at
      *
-     * @return string
+     * @return string|null
      */
     public function getUpdatedAt()
     {
@@ -3275,7 +3275,7 @@ public function getUpdatedAt()
     /**
      * Returns weight
      *
-     * @return float
+     * @return float|null
      */
     public function getWeight()
     {
@@ -3285,7 +3285,7 @@ public function getWeight()
     /**
      * Returns x_forwarded_for
      *
-     * @return string
+     * @return string|null
      */
     public function getXForwardedFor()
     {
diff --git a/app/code/Magento/Sales/Model/Order/Creditmemo.php b/app/code/Magento/Sales/Model/Order/Creditmemo.php
index 34aedc3d5d705..b40b09a4883d4 100644
--- a/app/code/Magento/Sales/Model/Order/Creditmemo.php
+++ b/app/code/Magento/Sales/Model/Order/Creditmemo.php
@@ -9,7 +9,6 @@
 namespace Magento\Sales\Model\Order;
 
 use Magento\Framework\Api\AttributeValueFactory;
-use Magento\Framework\Exception\LocalizedException;
 use Magento\Framework\Pricing\PriceCurrencyInterface;
 use Magento\Sales\Api\Data\CreditmemoInterface;
 use Magento\Sales\Model\AbstractModel;
@@ -787,7 +786,7 @@ public function getBaseGrandTotal()
     /**
      * Returns base_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount()
     {
@@ -807,7 +806,7 @@ public function getBaseShippingAmount()
     /**
      * Returns base_shipping_discount_tax_compensation_amnt
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingDiscountTaxCompensationAmnt()
     {
@@ -965,7 +964,7 @@ public function getGrandTotal()
     /**
      * Returns discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationAmount()
     {
@@ -1025,7 +1024,7 @@ public function getShippingAmount()
     /**
      * Returns shipping_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingDiscountTaxCompensationAmount()
     {
diff --git a/app/code/Magento/Sales/Model/Order/Creditmemo/Item.php b/app/code/Magento/Sales/Model/Order/Creditmemo/Item.php
index 4489655e36af9..1ca534939f0ca 100644
--- a/app/code/Magento/Sales/Model/Order/Creditmemo/Item.php
+++ b/app/code/Magento/Sales/Model/Order/Creditmemo/Item.php
@@ -288,7 +288,7 @@ public function isLast()
     /**
      * Returns additional_data
      *
-     * @return string
+     * @return string|null
      */
     public function getAdditionalData()
     {
@@ -308,7 +308,7 @@ public function getBaseCost()
     /**
      * Returns base_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountAmount()
     {
@@ -318,7 +318,7 @@ public function getBaseDiscountAmount()
     /**
      * Returns base_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount()
     {
@@ -338,7 +338,7 @@ public function getBasePrice()
     /**
      * Returns base_price_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBasePriceInclTax()
     {
@@ -348,7 +348,7 @@ public function getBasePriceInclTax()
     /**
      * Returns base_row_total
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowTotal()
     {
@@ -358,7 +358,7 @@ public function getBaseRowTotal()
     /**
      * Returns base_row_total_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowTotalInclTax()
     {
@@ -368,7 +368,7 @@ public function getBaseRowTotalInclTax()
     /**
      * Returns base_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxAmount()
     {
@@ -378,7 +378,7 @@ public function getBaseTaxAmount()
     /**
      * Returns base_weee_tax_applied_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxAppliedAmount()
     {
@@ -388,7 +388,7 @@ public function getBaseWeeeTaxAppliedAmount()
     /**
      * Returns base_weee_tax_applied_row_amnt
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxAppliedRowAmnt()
     {
@@ -398,7 +398,7 @@ public function getBaseWeeeTaxAppliedRowAmnt()
     /**
      * Returns base_weee_tax_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxDisposition()
     {
@@ -408,7 +408,7 @@ public function getBaseWeeeTaxDisposition()
     /**
      * Returns base_weee_tax_row_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxRowDisposition()
     {
@@ -418,7 +418,7 @@ public function getBaseWeeeTaxRowDisposition()
     /**
      * Returns description
      *
-     * @return string
+     * @return string|null
      */
     public function getDescription()
     {
@@ -428,7 +428,7 @@ public function getDescription()
     /**
      * Returns discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountAmount()
     {
@@ -438,7 +438,7 @@ public function getDiscountAmount()
     /**
      * Returns discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationAmount()
     {
@@ -448,7 +448,7 @@ public function getDiscountTaxCompensationAmount()
     /**
      * Returns name
      *
-     * @return string
+     * @return string|null
      */
     public function getName()
     {
@@ -468,7 +468,7 @@ public function getOrderItemId()
     /**
      * Returns parent_id
      *
-     * @return int
+     * @return int|null
      */
     public function getParentId()
     {
@@ -478,7 +478,7 @@ public function getParentId()
     /**
      * Returns price
      *
-     * @return float
+     * @return float|null
      */
     public function getPrice()
     {
@@ -488,7 +488,7 @@ public function getPrice()
     /**
      * Returns price_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getPriceInclTax()
     {
@@ -498,7 +498,7 @@ public function getPriceInclTax()
     /**
      * Returns product_id
      *
-     * @return int
+     * @return int|null
      */
     public function getProductId()
     {
@@ -518,7 +518,7 @@ public function getQty()
     /**
      * Returns row_total
      *
-     * @return float
+     * @return float|null
      */
     public function getRowTotal()
     {
@@ -528,7 +528,7 @@ public function getRowTotal()
     /**
      * Returns row_total_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getRowTotalInclTax()
     {
@@ -538,7 +538,7 @@ public function getRowTotalInclTax()
     /**
      * Returns sku
      *
-     * @return string
+     * @return string|null
      */
     public function getSku()
     {
@@ -548,7 +548,7 @@ public function getSku()
     /**
      * Returns tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxAmount()
     {
@@ -558,7 +558,7 @@ public function getTaxAmount()
     /**
      * Returns weee_tax_applied
      *
-     * @return string
+     * @return string|null
      */
     public function getWeeeTaxApplied()
     {
@@ -568,7 +568,7 @@ public function getWeeeTaxApplied()
     /**
      * Returns weee_tax_applied_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxAppliedAmount()
     {
@@ -578,7 +578,7 @@ public function getWeeeTaxAppliedAmount()
     /**
      * Returns weee_tax_applied_row_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxAppliedRowAmount()
     {
@@ -588,7 +588,7 @@ public function getWeeeTaxAppliedRowAmount()
     /**
      * Returns weee_tax_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxDisposition()
     {
@@ -598,7 +598,7 @@ public function getWeeeTaxDisposition()
     /**
      * Returns weee_tax_row_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxRowDisposition()
     {
diff --git a/app/code/Magento/Sales/Model/Order/Invoice.php b/app/code/Magento/Sales/Model/Order/Invoice.php
index 3df33c0780a27..a977de41c5585 100644
--- a/app/code/Magento/Sales/Model/Order/Invoice.php
+++ b/app/code/Magento/Sales/Model/Order/Invoice.php
@@ -777,7 +777,7 @@ public function getItems()
     /**
      * Return invoice comments
      *
-     * @return \Magento\Sales\Api\Data\InvoiceCommentInterface[]
+     * @return \Magento\Sales\Api\Data\InvoiceCommentInterface[]|null
      */
     public function getComments()
     {
@@ -805,7 +805,7 @@ public function getIncrementId()
     /**
      * Returns base_total_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTotalRefunded()
     {
@@ -815,7 +815,7 @@ public function getBaseTotalRefunded()
     /**
      * Returns discount_description
      *
-     * @return string
+     * @return string|null
      */
     public function getDiscountDescription()
     {
@@ -833,7 +833,7 @@ public function setItems($items)
     /**
      * Returns base_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getBaseCurrencyCode()
     {
@@ -843,7 +843,7 @@ public function getBaseCurrencyCode()
     /**
      * Returns base_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountAmount()
     {
@@ -853,7 +853,7 @@ public function getBaseDiscountAmount()
     /**
      * Returns base_grand_total
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseGrandTotal()
     {
@@ -863,7 +863,7 @@ public function getBaseGrandTotal()
     /**
      * Returns base_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount()
     {
@@ -873,7 +873,7 @@ public function getBaseDiscountTaxCompensationAmount()
     /**
      * Returns base_shipping_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingAmount()
     {
@@ -883,7 +883,7 @@ public function getBaseShippingAmount()
     /**
      * Returns base_shipping_discount_tax_compensation_amnt
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingDiscountTaxCompensationAmnt()
     {
@@ -893,7 +893,7 @@ public function getBaseShippingDiscountTaxCompensationAmnt()
     /**
      * Returns base_shipping_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingInclTax()
     {
@@ -903,7 +903,7 @@ public function getBaseShippingInclTax()
     /**
      * Returns base_shipping_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseShippingTaxAmount()
     {
@@ -913,7 +913,7 @@ public function getBaseShippingTaxAmount()
     /**
      * Returns base_subtotal
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotal()
     {
@@ -923,7 +923,7 @@ public function getBaseSubtotal()
     /**
      * Returns base_subtotal_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseSubtotalInclTax()
     {
@@ -933,7 +933,7 @@ public function getBaseSubtotalInclTax()
     /**
      * Returns base_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxAmount()
     {
@@ -943,7 +943,7 @@ public function getBaseTaxAmount()
     /**
      * Returns base_to_global_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseToGlobalRate()
     {
@@ -953,7 +953,7 @@ public function getBaseToGlobalRate()
     /**
      * Returns base_to_order_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseToOrderRate()
     {
@@ -963,7 +963,7 @@ public function getBaseToOrderRate()
     /**
      * Returns billing_address_id
      *
-     * @return int
+     * @return int|null
      */
     public function getBillingAddressId()
     {
@@ -973,7 +973,7 @@ public function getBillingAddressId()
     /**
      * Returns can_void_flag
      *
-     * @return int
+     * @return int|null
      */
     public function getCanVoidFlag()
     {
@@ -983,7 +983,7 @@ public function getCanVoidFlag()
     /**
      * Returns created_at
      *
-     * @return string
+     * @return string|null
      */
     public function getCreatedAt()
     {
@@ -1001,7 +1001,7 @@ public function setCreatedAt($createdAt)
     /**
      * Returns discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountAmount()
     {
@@ -1011,7 +1011,7 @@ public function getDiscountAmount()
     /**
      * Returns email_sent
      *
-     * @return int
+     * @return int|null
      */
     public function getEmailSent()
     {
@@ -1021,7 +1021,7 @@ public function getEmailSent()
     /**
      * Returns global_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getGlobalCurrencyCode()
     {
@@ -1031,7 +1031,7 @@ public function getGlobalCurrencyCode()
     /**
      * Returns grand_total
      *
-     * @return float
+     * @return float|null
      */
     public function getGrandTotal()
     {
@@ -1041,7 +1041,7 @@ public function getGrandTotal()
     /**
      * Returns discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationAmount()
     {
@@ -1051,7 +1051,7 @@ public function getDiscountTaxCompensationAmount()
     /**
      * Returns is_used_for_refund
      *
-     * @return int
+     * @return int|null
      */
     public function getIsUsedForRefund()
     {
@@ -1061,7 +1061,7 @@ public function getIsUsedForRefund()
     /**
      * Returns order_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getOrderCurrencyCode()
     {
@@ -1081,7 +1081,7 @@ public function getOrderId()
     /**
      * Returns shipping_address_id
      *
-     * @return int
+     * @return int|null
      */
     public function getShippingAddressId()
     {
@@ -1091,7 +1091,7 @@ public function getShippingAddressId()
     /**
      * Returns shipping_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingAmount()
     {
@@ -1101,7 +1101,7 @@ public function getShippingAmount()
     /**
      * Returns shipping_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingDiscountTaxCompensationAmount()
     {
@@ -1111,7 +1111,7 @@ public function getShippingDiscountTaxCompensationAmount()
     /**
      * Returns shipping_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingInclTax()
     {
@@ -1121,7 +1121,7 @@ public function getShippingInclTax()
     /**
      * Returns shipping_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getShippingTaxAmount()
     {
@@ -1131,7 +1131,7 @@ public function getShippingTaxAmount()
     /**
      * Returns state
      *
-     * @return int
+     * @return int|null
      */
     public function getState()
     {
@@ -1141,7 +1141,7 @@ public function getState()
     /**
      * Returns store_currency_code
      *
-     * @return string
+     * @return string|null
      */
     public function getStoreCurrencyCode()
     {
@@ -1151,7 +1151,7 @@ public function getStoreCurrencyCode()
     /**
      * Returns store_id
      *
-     * @return int
+     * @return int|null
      */
     public function getStoreId()
     {
@@ -1161,7 +1161,7 @@ public function getStoreId()
     /**
      * Returns store_to_base_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getStoreToBaseRate()
     {
@@ -1171,7 +1171,7 @@ public function getStoreToBaseRate()
     /**
      * Returns store_to_order_rate
      *
-     * @return float
+     * @return float|null
      */
     public function getStoreToOrderRate()
     {
@@ -1181,7 +1181,7 @@ public function getStoreToOrderRate()
     /**
      * Returns subtotal
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotal()
     {
@@ -1191,7 +1191,7 @@ public function getSubtotal()
     /**
      * Returns subtotal_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getSubtotalInclTax()
     {
@@ -1201,7 +1201,7 @@ public function getSubtotalInclTax()
     /**
      * Returns tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxAmount()
     {
@@ -1221,7 +1221,7 @@ public function getTotalQty()
     /**
      * Returns transaction_id
      *
-     * @return string
+     * @return string|null
      */
     public function getTransactionId()
     {
@@ -1242,7 +1242,7 @@ public function setTransactionId($transactionId)
     /**
      * Returns updated_at
      *
-     * @return string
+     * @return string|null
      */
     public function getUpdatedAt()
     {
diff --git a/app/code/Magento/Sales/Model/Order/Invoice/Item.php b/app/code/Magento/Sales/Model/Order/Invoice/Item.php
index 2e8b66e891e82..8f0add409086e 100644
--- a/app/code/Magento/Sales/Model/Order/Invoice/Item.php
+++ b/app/code/Magento/Sales/Model/Order/Invoice/Item.php
@@ -269,7 +269,7 @@ public function isLast()
     /**
      * Returns additional_data
      *
-     * @return string
+     * @return string|null
      */
     public function getAdditionalData()
     {
@@ -279,7 +279,7 @@ public function getAdditionalData()
     /**
      * Returns base_cost
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseCost()
     {
@@ -289,7 +289,7 @@ public function getBaseCost()
     /**
      * Returns base_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountAmount()
     {
@@ -299,7 +299,7 @@ public function getBaseDiscountAmount()
     /**
      * Returns base_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount()
     {
@@ -309,7 +309,7 @@ public function getBaseDiscountTaxCompensationAmount()
     /**
      * Returns base_price
      *
-     * @return float
+     * @return float|null
      */
     public function getBasePrice()
     {
@@ -319,7 +319,7 @@ public function getBasePrice()
     /**
      * Returns base_price_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBasePriceInclTax()
     {
@@ -329,7 +329,7 @@ public function getBasePriceInclTax()
     /**
      * Returns base_row_total
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowTotal()
     {
@@ -339,7 +339,7 @@ public function getBaseRowTotal()
     /**
      * Returns base_row_total_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowTotalInclTax()
     {
@@ -349,7 +349,7 @@ public function getBaseRowTotalInclTax()
     /**
      * Returns base_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxAmount()
     {
@@ -359,7 +359,7 @@ public function getBaseTaxAmount()
     /**
      * Returns description
      *
-     * @return string
+     * @return string|null
      */
     public function getDescription()
     {
@@ -369,7 +369,7 @@ public function getDescription()
     /**
      * Returns discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountAmount()
     {
@@ -379,7 +379,7 @@ public function getDiscountAmount()
     /**
      * Returns discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationAmount()
     {
@@ -389,7 +389,7 @@ public function getDiscountTaxCompensationAmount()
     /**
      * Returns name
      *
-     * @return string
+     * @return string|null
      */
     public function getName()
     {
@@ -409,7 +409,7 @@ public function getOrderItemId()
     /**
      * Returns parent_id
      *
-     * @return int
+     * @return int|null
      */
     public function getParentId()
     {
@@ -419,7 +419,7 @@ public function getParentId()
     /**
      * Returns price
      *
-     * @return float
+     * @return float|null
      */
     public function getPrice()
     {
@@ -429,7 +429,7 @@ public function getPrice()
     /**
      * Returns price_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getPriceInclTax()
     {
@@ -439,7 +439,7 @@ public function getPriceInclTax()
     /**
      * Returns product_id
      *
-     * @return int
+     * @return int|null
      */
     public function getProductId()
     {
@@ -459,7 +459,7 @@ public function getQty()
     /**
      * Returns row_total
      *
-     * @return float
+     * @return float|null
      */
     public function getRowTotal()
     {
@@ -469,7 +469,7 @@ public function getRowTotal()
     /**
      * Returns row_total_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getRowTotalInclTax()
     {
@@ -489,7 +489,7 @@ public function getSku()
     /**
      * Returns tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxAmount()
     {
diff --git a/app/code/Magento/Sales/Model/Order/Item.php b/app/code/Magento/Sales/Model/Order/Item.php
index 911d279f3bca9..7aaa0297472ec 100644
--- a/app/code/Magento/Sales/Model/Order/Item.php
+++ b/app/code/Magento/Sales/Model/Order/Item.php
@@ -435,7 +435,7 @@ public static function getStatuses()
     /**
      * Redeclare getter for back compatibility
      *
-     * @return float
+     * @return float|null
      */
     public function getOriginalPrice()
     {
@@ -692,7 +692,7 @@ public function getStore()
     /**
      * Returns additional_data
      *
-     * @return string
+     * @return string|null
      */
     public function getAdditionalData()
     {
@@ -702,7 +702,7 @@ public function getAdditionalData()
     /**
      * Returns amount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getAmountRefunded()
     {
@@ -712,7 +712,7 @@ public function getAmountRefunded()
     /**
      * Returns applied_rule_ids
      *
-     * @return string
+     * @return string|null
      */
     public function getAppliedRuleIds()
     {
@@ -722,7 +722,7 @@ public function getAppliedRuleIds()
     /**
      * Returns base_amount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseAmountRefunded()
     {
@@ -732,7 +732,7 @@ public function getBaseAmountRefunded()
     /**
      * Returns base_cost
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseCost()
     {
@@ -742,7 +742,7 @@ public function getBaseCost()
     /**
      * Returns base_discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountAmount()
     {
@@ -752,7 +752,7 @@ public function getBaseDiscountAmount()
     /**
      * Returns base_discount_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountInvoiced()
     {
@@ -762,7 +762,7 @@ public function getBaseDiscountInvoiced()
     /**
      * Returns base_discount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountRefunded()
     {
@@ -772,7 +772,7 @@ public function getBaseDiscountRefunded()
     /**
      * Returns base_discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationAmount()
     {
@@ -782,7 +782,7 @@ public function getBaseDiscountTaxCompensationAmount()
     /**
      * Returns base_discount_tax_compensation_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationInvoiced()
     {
@@ -792,7 +792,7 @@ public function getBaseDiscountTaxCompensationInvoiced()
     /**
      * Returns base_discount_tax_compensation_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseDiscountTaxCompensationRefunded()
     {
@@ -802,7 +802,7 @@ public function getBaseDiscountTaxCompensationRefunded()
     /**
      * Returns base_original_price
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseOriginalPrice()
     {
@@ -812,7 +812,7 @@ public function getBaseOriginalPrice()
     /**
      * Returns base_price
      *
-     * @return float
+     * @return float|null
      */
     public function getBasePrice()
     {
@@ -822,7 +822,7 @@ public function getBasePrice()
     /**
      * Returns base_price_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBasePriceInclTax()
     {
@@ -832,7 +832,7 @@ public function getBasePriceInclTax()
     /**
      * Returns base_row_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowInvoiced()
     {
@@ -842,7 +842,7 @@ public function getBaseRowInvoiced()
     /**
      * Returns base_row_total
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowTotal()
     {
@@ -852,7 +852,7 @@ public function getBaseRowTotal()
     /**
      * Returns base_row_total_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseRowTotalInclTax()
     {
@@ -862,7 +862,7 @@ public function getBaseRowTotalInclTax()
     /**
      * Returns base_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxAmount()
     {
@@ -872,7 +872,7 @@ public function getBaseTaxAmount()
     /**
      * Returns base_tax_before_discount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxBeforeDiscount()
     {
@@ -882,7 +882,7 @@ public function getBaseTaxBeforeDiscount()
     /**
      * Returns base_tax_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxInvoiced()
     {
@@ -892,7 +892,7 @@ public function getBaseTaxInvoiced()
     /**
      * Returns base_tax_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseTaxRefunded()
     {
@@ -902,7 +902,7 @@ public function getBaseTaxRefunded()
     /**
      * Returns base_weee_tax_applied_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxAppliedAmount()
     {
@@ -912,7 +912,7 @@ public function getBaseWeeeTaxAppliedAmount()
     /**
      * Returns base_weee_tax_applied_row_amnt
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxAppliedRowAmnt()
     {
@@ -922,7 +922,7 @@ public function getBaseWeeeTaxAppliedRowAmnt()
     /**
      * Returns base_weee_tax_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxDisposition()
     {
@@ -932,7 +932,7 @@ public function getBaseWeeeTaxDisposition()
     /**
      * Returns base_weee_tax_row_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getBaseWeeeTaxRowDisposition()
     {
@@ -942,7 +942,7 @@ public function getBaseWeeeTaxRowDisposition()
     /**
      * Returns created_at
      *
-     * @return string
+     * @return string|null
      */
     public function getCreatedAt()
     {
@@ -960,7 +960,7 @@ public function setCreatedAt($createdAt)
     /**
      * Returns description
      *
-     * @return string
+     * @return string|null
      */
     public function getDescription()
     {
@@ -970,7 +970,7 @@ public function getDescription()
     /**
      * Returns discount_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountAmount()
     {
@@ -980,7 +980,7 @@ public function getDiscountAmount()
     /**
      * Returns discount_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountInvoiced()
     {
@@ -990,7 +990,7 @@ public function getDiscountInvoiced()
     /**
      * Returns discount_percent
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountPercent()
     {
@@ -1000,7 +1000,7 @@ public function getDiscountPercent()
     /**
      * Returns discount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountRefunded()
     {
@@ -1010,7 +1010,7 @@ public function getDiscountRefunded()
     /**
      * Returns event_id
      *
-     * @return int
+     * @return int|null
      */
     public function getEventId()
     {
@@ -1020,7 +1020,7 @@ public function getEventId()
     /**
      * Returns ext_order_item_id
      *
-     * @return string
+     * @return string|null
      */
     public function getExtOrderItemId()
     {
@@ -1030,7 +1030,7 @@ public function getExtOrderItemId()
     /**
      * Returns free_shipping
      *
-     * @return int
+     * @return int|null
      */
     public function getFreeShipping()
     {
@@ -1040,7 +1040,7 @@ public function getFreeShipping()
     /**
      * Returns gw_base_price
      *
-     * @return float
+     * @return float|null
      */
     public function getGwBasePrice()
     {
@@ -1050,7 +1050,7 @@ public function getGwBasePrice()
     /**
      * Returns gw_base_price_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getGwBasePriceInvoiced()
     {
@@ -1060,7 +1060,7 @@ public function getGwBasePriceInvoiced()
     /**
      * Returns gw_base_price_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getGwBasePriceRefunded()
     {
@@ -1070,7 +1070,7 @@ public function getGwBasePriceRefunded()
     /**
      * Returns gw_base_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getGwBaseTaxAmount()
     {
@@ -1080,7 +1080,7 @@ public function getGwBaseTaxAmount()
     /**
      * Returns gw_base_tax_amount_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getGwBaseTaxAmountInvoiced()
     {
@@ -1090,7 +1090,7 @@ public function getGwBaseTaxAmountInvoiced()
     /**
      * Returns gw_base_tax_amount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getGwBaseTaxAmountRefunded()
     {
@@ -1100,7 +1100,7 @@ public function getGwBaseTaxAmountRefunded()
     /**
      * Returns gw_id
      *
-     * @return int
+     * @return int|null
      */
     public function getGwId()
     {
@@ -1110,7 +1110,7 @@ public function getGwId()
     /**
      * Returns gw_price
      *
-     * @return float
+     * @return float|null
      */
     public function getGwPrice()
     {
@@ -1120,7 +1120,7 @@ public function getGwPrice()
     /**
      * Returns gw_price_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getGwPriceInvoiced()
     {
@@ -1130,7 +1130,7 @@ public function getGwPriceInvoiced()
     /**
      * Returns gw_price_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getGwPriceRefunded()
     {
@@ -1140,7 +1140,7 @@ public function getGwPriceRefunded()
     /**
      * Returns gw_tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getGwTaxAmount()
     {
@@ -1150,7 +1150,7 @@ public function getGwTaxAmount()
     /**
      * Returns gw_tax_amount_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getGwTaxAmountInvoiced()
     {
@@ -1160,7 +1160,7 @@ public function getGwTaxAmountInvoiced()
     /**
      * Returns gw_tax_amount_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getGwTaxAmountRefunded()
     {
@@ -1170,7 +1170,7 @@ public function getGwTaxAmountRefunded()
     /**
      * Returns discount_tax_compensation_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationAmount()
     {
@@ -1180,7 +1180,7 @@ public function getDiscountTaxCompensationAmount()
     /**
      * Returns discount_tax_compensation_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationCanceled()
     {
@@ -1190,7 +1190,7 @@ public function getDiscountTaxCompensationCanceled()
     /**
      * Returns discount_tax_compensation_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationInvoiced()
     {
@@ -1200,7 +1200,7 @@ public function getDiscountTaxCompensationInvoiced()
     /**
      * Returns discount_tax_compensation_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getDiscountTaxCompensationRefunded()
     {
@@ -1210,7 +1210,7 @@ public function getDiscountTaxCompensationRefunded()
     /**
      * Returns is_qty_decimal
      *
-     * @return int
+     * @return int|null
      */
     public function getIsQtyDecimal()
     {
@@ -1220,7 +1220,7 @@ public function getIsQtyDecimal()
     /**
      * Returns is_virtual
      *
-     * @return int
+     * @return int|null
      */
     public function getIsVirtual()
     {
@@ -1230,7 +1230,7 @@ public function getIsVirtual()
     /**
      * Returns item_id
      *
-     * @return int
+     * @return int|null
      */
     public function getItemId()
     {
@@ -1240,7 +1240,7 @@ public function getItemId()
     /**
      * Returns locked_do_invoice
      *
-     * @return int
+     * @return int|null
      */
     public function getLockedDoInvoice()
     {
@@ -1250,7 +1250,7 @@ public function getLockedDoInvoice()
     /**
      * Returns locked_do_ship
      *
-     * @return int
+     * @return int|null
      */
     public function getLockedDoShip()
     {
@@ -1260,7 +1260,7 @@ public function getLockedDoShip()
     /**
      * Returns name
      *
-     * @return string
+     * @return string|null
      */
     public function getName()
     {
@@ -1270,7 +1270,7 @@ public function getName()
     /**
      * Returns no_discount
      *
-     * @return int
+     * @return int|null
      */
     public function getNoDiscount()
     {
@@ -1280,7 +1280,7 @@ public function getNoDiscount()
     /**
      * Returns order_id
      *
-     * @return int
+     * @return int|null
      */
     public function getOrderId()
     {
@@ -1290,7 +1290,7 @@ public function getOrderId()
     /**
      * Returns parent_item_id
      *
-     * @return int
+     * @return int|null
      */
     public function getParentItemId()
     {
@@ -1300,7 +1300,7 @@ public function getParentItemId()
     /**
      * Returns price
      *
-     * @return float
+     * @return float|null
      */
     public function getPrice()
     {
@@ -1310,7 +1310,7 @@ public function getPrice()
     /**
      * Returns price_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getPriceInclTax()
     {
@@ -1320,7 +1320,7 @@ public function getPriceInclTax()
     /**
      * Returns product_id
      *
-     * @return int
+     * @return int|null
      */
     public function getProductId()
     {
@@ -1330,7 +1330,7 @@ public function getProductId()
     /**
      * Returns product_type
      *
-     * @return string
+     * @return string|null
      */
     public function getProductType()
     {
@@ -1340,7 +1340,7 @@ public function getProductType()
     /**
      * Returns qty_backordered
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyBackordered()
     {
@@ -1350,7 +1350,7 @@ public function getQtyBackordered()
     /**
      * Returns qty_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyCanceled()
     {
@@ -1360,7 +1360,7 @@ public function getQtyCanceled()
     /**
      * Returns qty_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyInvoiced()
     {
@@ -1370,7 +1370,7 @@ public function getQtyInvoiced()
     /**
      * Returns qty_ordered
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyOrdered()
     {
@@ -1380,7 +1380,7 @@ public function getQtyOrdered()
     /**
      * Returns qty_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyRefunded()
     {
@@ -1390,7 +1390,7 @@ public function getQtyRefunded()
     /**
      * Returns qty_returned
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyReturned()
     {
@@ -1400,7 +1400,7 @@ public function getQtyReturned()
     /**
      * Returns qty_shipped
      *
-     * @return float
+     * @return float|null
      */
     public function getQtyShipped()
     {
@@ -1410,7 +1410,7 @@ public function getQtyShipped()
     /**
      * Returns quote_item_id
      *
-     * @return int
+     * @return int|null
      */
     public function getQuoteItemId()
     {
@@ -1420,7 +1420,7 @@ public function getQuoteItemId()
     /**
      * Returns row_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getRowInvoiced()
     {
@@ -1430,7 +1430,7 @@ public function getRowInvoiced()
     /**
      * Returns row_total
      *
-     * @return float
+     * @return float|null
      */
     public function getRowTotal()
     {
@@ -1440,7 +1440,7 @@ public function getRowTotal()
     /**
      * Returns row_total_incl_tax
      *
-     * @return float
+     * @return float|null
      */
     public function getRowTotalInclTax()
     {
@@ -1450,7 +1450,7 @@ public function getRowTotalInclTax()
     /**
      * Returns row_weight
      *
-     * @return float
+     * @return float|null
      */
     public function getRowWeight()
     {
@@ -1470,7 +1470,7 @@ public function getSku()
     /**
      * Returns store_id
      *
-     * @return int
+     * @return int|null
      */
     public function getStoreId()
     {
@@ -1480,7 +1480,7 @@ public function getStoreId()
     /**
      * Returns tax_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxAmount()
     {
@@ -1490,7 +1490,7 @@ public function getTaxAmount()
     /**
      * Returns tax_before_discount
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxBeforeDiscount()
     {
@@ -1500,7 +1500,7 @@ public function getTaxBeforeDiscount()
     /**
      * Returns tax_canceled
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxCanceled()
     {
@@ -1510,7 +1510,7 @@ public function getTaxCanceled()
     /**
      * Returns tax_invoiced
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxInvoiced()
     {
@@ -1520,7 +1520,7 @@ public function getTaxInvoiced()
     /**
      * Returns tax_percent
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxPercent()
     {
@@ -1530,7 +1530,7 @@ public function getTaxPercent()
     /**
      * Returns tax_refunded
      *
-     * @return float
+     * @return float|null
      */
     public function getTaxRefunded()
     {
@@ -1540,7 +1540,7 @@ public function getTaxRefunded()
     /**
      * Returns updated_at
      *
-     * @return string
+     * @return string|null
      */
     public function getUpdatedAt()
     {
@@ -1550,7 +1550,7 @@ public function getUpdatedAt()
     /**
      * Returns weee_tax_applied
      *
-     * @return string
+     * @return string|null
      */
     public function getWeeeTaxApplied()
     {
@@ -1560,7 +1560,7 @@ public function getWeeeTaxApplied()
     /**
      * Returns weee_tax_applied_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxAppliedAmount()
     {
@@ -1570,7 +1570,7 @@ public function getWeeeTaxAppliedAmount()
     /**
      * Returns weee_tax_applied_row_amount
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxAppliedRowAmount()
     {
@@ -1580,7 +1580,7 @@ public function getWeeeTaxAppliedRowAmount()
     /**
      * Returns weee_tax_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxDisposition()
     {
@@ -1590,7 +1590,7 @@ public function getWeeeTaxDisposition()
     /**
      * Returns weee_tax_row_disposition
      *
-     * @return float
+     * @return float|null
      */
     public function getWeeeTaxRowDisposition()
     {
@@ -1600,7 +1600,7 @@ public function getWeeeTaxRowDisposition()
     /**
      * Returns weight
      *
-     * @return float
+     * @return float|null
      */
     public function getWeight()
     {