diff --git a/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldItemList.php b/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldItemList.php
index abfd1d1..5e6d7dc 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldItemList.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldItemList.php
@@ -12,8 +12,6 @@
 use Drupal\Core\TypedData\TypedDataInterface;
 use Drupal\Core\TypedData\Plugin\DataType\ItemList;
 use Drupal\Core\Language\Language;
-use Drupal\Core\TypedData\Annotation\DataType;
-use Drupal\Core\Annotation\Translation;
 
 /**
  * Defines a data type plugin for entity fields, i.e. the list of field items.
@@ -112,7 +110,7 @@ public function getValue($include_computed = FALSE) {
   }
 
   /**
-   * Overrides \Drupal\Core\TypedData\Plugin\DataType\ItemList::setValue().
+   * {@inheritdoc}
    */
   public function setValue($values, $notify = TRUE) {
     if (!isset($values) || $values === array()) {
diff --git a/core/modules/edit/edit.module b/core/modules/edit/edit.module
index 339e255..2ae7c02 100644
--- a/core/modules/edit/edit.module
+++ b/core/modules/edit/edit.module
@@ -186,7 +186,7 @@ function edit_preprocess_field(&$variables) {
   // Fields that are not part of the entity (i.e. dynamically injected "pseudo
   // fields") and computed fields are not editable.
   $definition = $entity->getPropertyDefinition($element['#field_name']);
-  if ($definition && empty($definition['computed'])) {
+  if ($definition && !$definition->isComputed()) {
     $variables['attributes']['data-edit-id'] = $entity->entityType() . '/' . $entity->id() . '/' . $element['#field_name'] . '/' . $element['#language'] . '/' . $element['#view_mode'];
   }
 }
diff --git a/core/modules/editor/editor.module b/core/modules/editor/editor.module
index 6364102..7807fc6 100644
--- a/core/modules/editor/editor.module
+++ b/core/modules/editor/editor.module
@@ -550,7 +550,7 @@ function _editor_get_processed_text_fields(ContentEntityInterface $entity) {
   // Find all configurable fields, because only they could have a
   // text_processing setting.
   $configurable_fields = array_keys(array_filter($properties, function ($definition) {
-    return isset($definition['configurable']) && $definition['configurable'] === TRUE;
+    return $definition->isFieldConfigurable();
   }));
   if (empty($configurable_fields)) {
     return array();