Fixing a Mistype Error

app/code/Magento/Dhl/Model/Carrier.php

@@ -1263,8 +1263,20 @@ protected function _doShipmentRequest(\Magento\Framework\DataObject $request)
      *
      * @param \Magento\Framework\DataObject $request
      * @return $this|\Magento\Framework\DataObject|boolean
+     * @deprecated
      */
     public function proccessAdditionalValidation(\Magento\Framework\DataObject $request)
+    {
+        return $this->processAdditionalValidation($request);
+    }
+
+    /**
+     * Processing additional validation to check is carrier applicable.
+     *
+     * @param \Magento\Framework\DataObject $request
+     * @return $this|\Magento\Framework\DataObject|boolean
+     */
+    public function processAdditionalValidation(\Magento\Framework\DataObject $request)
     {
         //Skip by item validation if there is no items in request
         if (!count($this->getAllItems($request))) {

app/code/Magento/Shipping/Model/Carrier/AbstractCarrier.php

@@ -330,11 +330,24 @@ public function checkAvailableShipCountries(\Magento\Framework\DataObject $reque
      * @return $this|bool|\Magento\Framework\DataObject
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
-    public function proccessAdditionalValidation(\Magento\Framework\DataObject $request)
+    public function processAdditionalValidation(\Magento\Framework\DataObject $request)
     {
         return $this;
     }
 
+    /**
+     * Processing additional validation to check is carrier applicable.
+     *
+     * @param \Magento\Framework\DataObject $request
+     * @return $this|bool|\Magento\Framework\DataObject
+     * @deprecated
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function proccessAdditionalValidation(\Magento\Framework\DataObject $request)
+    {
+        return $this->processAdditionalValidation($request);
+    }
+
     /**
      * Determine whether current carrier enabled for activity
      *

app/code/Magento/Shipping/Model/Carrier/AbstractCarrierInterface.php

@@ -90,7 +90,7 @@ public function checkAvailableShipCountries(\Magento\Framework\DataObject $reque
      * @return $this|\Magento\Framework\DataObject|boolean
      * @api
      */
-    public function proccessAdditionalValidation(\Magento\Framework\DataObject $request);
+    public function processAdditionalValidation(\Magento\Framework\DataObject $request);
 
     /**
      * Determine whether current carrier enabled for activity

app/code/Magento/Shipping/Model/Carrier/AbstractCarrierOnline.php

@@ -301,10 +301,24 @@ public function getAllItems(RateRequest $request)
      *
      * @param \Magento\Framework\DataObject $request
      * @return $this|bool|\Magento\Framework\DataObject
+     * @deprecated
      * @SuppressWarnings(PHPMD.CyclomaticComplexity)
      * @SuppressWarnings(PHPMD.NPathComplexity)
      */
     public function proccessAdditionalValidation(\Magento\Framework\DataObject $request)
+    {
+        return $this->processAdditionalValidation($request);
+    }
+
+    /**
+     * Processing additional validation to check if carrier applicable.
+     *
+     * @param \Magento\Framework\DataObject $request
+     * @return $this|bool|\Magento\Framework\DataObject
+     * @SuppressWarnings(PHPMD.CyclomaticComplexity)
+     * @SuppressWarnings(PHPMD.NPathComplexity)
+     */
+    public function processAdditionalValidation(\Magento\Framework\DataObject $request)
     {
         //Skip by item validation if there is no items in request
         if (!count($this->getAllItems($request))) {

app/code/Magento/Shipping/Model/Shipping.php

@@ -259,7 +259,7 @@ public function collectCarrierRates($carrierCode, $request)
         $carrier->setActiveFlag($this->_availabilityConfigField);
         $result = $carrier->checkAvailableShipCountries($request);
         if (false !== $result && !$result instanceof \Magento\Quote\Model\Quote\Address\RateResult\Error) {
-            $result = $carrier->proccessAdditionalValidation($request);
+            $result = $carrier->processAdditionalValidation($request);
         }
         /*
          * Result will be false if the admin set not to show the shipping module

app/code/Magento/Shipping/Test/Unit/Model/Carrier/AbstractCarrierOnlineTest.php

@@ -99,7 +99,7 @@ public function testComposePackages()
         $this->stockItemData->expects($this->atLeastOnce())->method('getIsDecimalDivided')
             ->will($this->returnValue(true));
 
-        $this->carrier->proccessAdditionalValidation($request);
+        $this->carrier->processAdditionalValidation($request);
     }
 
     public function testParseXml()