only in patch2:
unchanged:
--- a/src/Form/POSForm.php
+++ b/src/Form/POSForm.php
@@ -8,7 +8,7 @@ use Drupal\commerce_price\Price;
 use Drupal\commerce_store\CurrentStore;
 use Drupal\Component\Datetime\TimeInterface;
 use Drupal\Core\Entity\ContentEntityForm;
-use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityRepositoryInterface;
 use Drupal\Core\Entity\EntityTypeBundleInfoInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Url;
@@ -45,8 +45,8 @@ class POSForm extends ContentEntityForm {
   /**
    * Constructs a new POSForm object.
    *
-   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
-   *   The entity manager.
+   * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
+   *   The entity repository service.
    * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
    *   The entity type bundle info.
    * @param \Drupal\Component\Datetime\TimeInterface $time
@@ -56,8 +56,8 @@ class POSForm extends ContentEntityForm {
    * @param \Drupal\Core\TempStore\PrivateTempStoreFactory $temp_store_factory
    *   Used for storing the current active order.
    */
-  public function __construct(EntityManagerInterface $entity_manager, EntityTypeBundleInfoInterface $entity_type_bundle_info, TimeInterface $time, CurrentStore $current_store, PrivateTempStoreFactory $temp_store_factory) {
-    parent::__construct($entity_manager, $entity_type_bundle_info, $time);
+  public function __construct(EntityRepositoryInterface $entity_repository, EntityTypeBundleInfoInterface $entity_type_bundle_info, TimeInterface $time, CurrentStore $current_store, PrivateTempStoreFactory $temp_store_factory) {
+    parent::__construct($entity_repository, $entity_type_bundle_info, $time);
 
     $this->currentStore = $current_store;
     // This is a hack around what I think is a php bug, at least in 7.1.15
@@ -71,7 +71,7 @@ class POSForm extends ContentEntityForm {
    */
   public static function create(ContainerInterface $container) {
     return new static(
-      $container->get('entity.manager'),
+      $container->get('entity.repository'),
       $container->get('entity_type.bundle.info'),
       $container->get('datetime.time'),
       $container->get('commerce_store.current_store'),