Cleanup: don't use void return value from method calls.

app/code/Magento/Downloadable/Model/Product/TypeHandler/Link.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2015 Adobe
+ * All Rights Reserved.
  */
 namespace Magento\Downloadable\Model\Product\TypeHandler;
 
@@ -10,7 +10,6 @@
 use Magento\Downloadable\Model\ComponentInterface;
 
 /**
- * Class Link
  * @api
  * @since 100.0.2
  */
@@ -22,7 +21,7 @@ class Link extends AbstractTypeHandler
     private $sampleItem = [];
 
     /**
-     * @var \Magento\Downloadable\Model\ComponentInterfaceFactory
+     * @var \Magento\Downloadable\Model\LinkFactory
      */
     private $linkFactory;
 
@@ -49,54 +48,55 @@ public function __construct(
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function getDataKey()
     {
         return 'link';
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function getIdentifierKey()
     {
         return 'link_id';
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function save(Product $product, array $data)
     {
         parent::save($product, $data);
+
         if ($product->getLinksPurchasedSeparately()) {
             $product->setIsCustomOptionChanged();
         }
+
+        return $this;
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     protected function clear()
     {
         $this->sampleItem = [];
-        return parent::clear();
+
+        parent::clear();
     }
 
     /**
-     * @return ComponentInterface
+     * @inheritdoc
      */
     protected function createItem()
     {
         return $this->linkFactory->create();
     }
 
     /**
-     * @param ComponentInterface $model
-     * @param array $data
-     * @param Product $product
-     * @return void
+     * @inheritdoc
      */
     protected function setDataToModel(ComponentInterface $model, array $data, Product $product)
     {
@@ -124,17 +124,15 @@ protected function setDataToModel(ComponentInterface $model, array $data, Produc
     }
 
     /**
-     * @param ComponentInterface $model
-     * @param Product $product
-     * @return void
+     * @inheritdoc
      */
     protected function linkToProduct(ComponentInterface $model, Product $product)
     {
         $product->setLastAddedLinkId($model->getId());
     }
 
     /**
-     * @return void
+     * @inheritdoc
      */
     protected function processDelete()
     {
@@ -144,7 +142,7 @@ protected function processDelete()
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     protected function saveItem(Product $product, array $item)
     {
@@ -156,9 +154,7 @@ protected function saveItem(Product $product, array $item)
     }
 
     /**
-     * @param ComponentInterface $model
-     * @param array $files
-     * @return void
+     * @inheritdoc
      */
     protected function setFiles(ComponentInterface $model, array $files)
     {

app/code/Magento/Eav/Model/ResourceModel/Entity/Attribute/Group.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2015 Adobe
+ * All Rights Reserved.
  */
 namespace Magento\Eav\Model\ResourceModel\Entity\Attribute;
 
@@ -156,12 +156,12 @@ public function updateDefaultGroup($attributeSetId)
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     protected function saveNewObject(AbstractModel $object)
     {
         try {
-            return parent::saveNewObject($object);
+            parent::saveNewObject($object);
         } catch (DuplicateException $e) {
             throw new AttributeGroupAlreadyExistsException(
                 __(
@@ -173,12 +173,12 @@ protected function saveNewObject(AbstractModel $object)
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     protected function updateObject(AbstractModel $object)
     {
         try {
-            return parent::updateObject($object);
+            parent::updateObject($object);
         } catch (DuplicateException $e) {
             throw new AttributeGroupAlreadyExistsException(
                 __(

app/code/Magento/Store/Block/Store/Switcher.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2014 Adobe
+ * All Rights Reserved.
  */
 
 /**
@@ -29,15 +29,11 @@ class Switcher extends \Magento\Framework\View\Element\Template
     protected $_loaded = false;
 
     /**
-     * Store factory
-     *
      * @var \Magento\Store\Model\StoreFactory
      */
     protected $_storeFactory;
 
     /**
-     * Store group factory
-     *
      * @var \Magento\Store\Model\GroupFactory
      */
     protected $_storeGroupFactory;
@@ -60,17 +56,20 @@ public function __construct(
     }
 
     /**
-     * @return void
+     * @inheritdoc
      */
     protected function _construct()
     {
         $this->_loadData();
         $this->setStores([]);
         $this->setLanguages([]);
-        return parent::_construct();
+
+        parent::_construct();
     }
 
     /**
+     * Load data
+     *
      * @return $this
      */
     protected function _loadData()
@@ -104,6 +103,8 @@ protected function _loadData()
     }
 
     /**
+     * Sets stores and returns their count
+     *
      * @return int
      */
     public function getStoreCount()
@@ -134,6 +135,8 @@ public function getStoreCount()
     }
 
     /**
+     * Sets languages and returns their count
+     *
      * @return int
      */
     public function getLanguageCount()
@@ -148,6 +151,8 @@ public function getLanguageCount()
     }
 
     /**
+     * Returns current store id
+     *
      * @return int
      */
     public function getCurrentStoreId()
@@ -156,6 +161,8 @@ public function getCurrentStoreId()
     }
 
     /**
+     * Returns current store code
+     *
      * @return string
      */
     public function getCurrentStoreCode()

lib/internal/Magento/Framework/HTTP/Client/Socket.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2014 Adobe
+ * All Rights Reserved.
  */
 
 /**
@@ -419,8 +419,7 @@ protected function processResponse()
 
         $line = explode(" ", $responseLine, 3);
         if (count($line) != 3) {
-            // phpstan:ignore "Result of method Magento\Framework\HTTP\Client\Socket::doError() (void) is used."
-            return $this->doError("Invalid response line returned from server: " . $responseLine);
+            $this->doError("Invalid response line returned from server: " . $responseLine);
         }
         $this->_responseStatus = (int)$line[1];
         $this->processResponseHeaders();
@@ -466,8 +465,7 @@ protected function makeRequest($method, $uri, $params = [])
         $errno = $errstr = '';
         $this->_sock = @fsockopen($this->_host, $this->_port, $errno, $errstr, $this->_timeout);
         if (!$this->_sock) {
-            // phpstan:ignore "Result of method Magento\Framework\HTTP\Client\Socket::doError() (void) is used."
-            return $this->doError(sprintf("[errno: %d] %s", $errno, $errstr));
+            $this->doError(sprintf("[errno: %d] %s", $errno, $errstr));
         }
 
         $crlf = "\r\n";