diff --git a/core/lib/Drupal/Core/Field/FieldItemListComputed.php b/core/lib/Drupal/Core/Field/FieldItemListComputed.php
deleted file mode 100644
index 30c076957a..0000000000
--- a/core/lib/Drupal/Core/Field/FieldItemListComputed.php
+++ /dev/null
@@ -1,65 +0,0 @@
-<?php
-
-namespace Drupal\Core\Field;
-
-use Drupal\Core\Form\FormStateInterface;
-
-/**
- * Represents a computed entity field; that is, a list of field item objects.
- */
-abstract class FieldItemListComputed extends FieldItemList {
-
-  /**
-   * Numerically indexed array of field items.
-   *
-   * @var \Drupal\Core\Field\FieldItemInterface[]
-   */
-  protected $list = array();
-
-  /**
-   * This will populate the field item list with computed values.
-   */
-  public function computeItems() {
-    $this->list = [];
-    $values = $this->computeItemValues();
-    if (is_array($values) && !empty($values)) {
-      foreach ($values as $delta => $value) {
-        $this->list[] = $this->createItem($delta, $value);
-      }
-    }
-  }
-
-  /**
-   * This should compute the values that are used to create the field items.
-   *
-   * @return array
-   *   The values for the field items.
-   */
-  protected abstract function computeItemValues();
-
-  /**
-   * This will do nothing as computed lists are readonly by default.
-   */
-  public function setValue($values, $notify = TRUE) {}
-
-  /**
-   * This will do nothing as computed lists are readonly by default.
-   */
-  public function appendItem($value = NULL) {}
-
-  /**
-   * This will do nothing as computed lists are readonly by default.
-   */
-  public function defaultValuesForm(array &$form, FormStateInterface $form_state) {}
-
-  /**
-   * This will do nothing as computed lists are readonly by default.
-   */
-  public function removeItem($index) {}
-
-  /**
-   * This will do nothing as computed lists are readonly by default.
-   */
-  public function set($index, $value) {}
-
-}
diff --git a/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php b/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php
new file mode 100644
index 0000000000..e3f794fb08
--- /dev/null
+++ b/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Drupal\Core\Field;
+
+/**
+ * Interface for computed fields, being lists of field items.
+ *
+ * @see \Drupal\Core\Field\FieldItemInterface
+ */
+interface FieldItemListComputedInterface {
+
+  /**
+   * This will populate the field item list with computed values.
+   */
+  public function computeValue();
+
+}
diff --git a/core/lib/Drupal/Core/TypedData/TypedDataManager.php b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
index 17f3b0211e..d54d637e58 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataManager.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
@@ -7,7 +7,7 @@
 use Drupal\Core\DependencyInjection\ClassResolverInterface;
 use Drupal\Core\DependencyInjection\DependencySerializationTrait;
 use Drupal\Core\Extension\ModuleHandlerInterface;
-use Drupal\Core\Field\FieldItemListComputed;
+use Drupal\Core\Field\FieldItemListComputedInterface;
 use Drupal\Core\Plugin\DefaultPluginManager;
 use Drupal\Core\TypedData\Validation\ExecutionContextFactory;
 use Drupal\Core\TypedData\Validation\RecursiveValidator;
@@ -200,9 +200,11 @@ public function getPropertyInstance(TypedDataInterface $object, $property_name,
     $property->setContext($property_name, $object);
     if (isset($value)) {
       $property->setValue($value, FALSE);
-    } elseif ($property instanceof FieldItemListComputed) {
-      // populate the computed list with values as there are no initial values to set.
-      $property->computeItems();
+    }
+    elseif ($property instanceof FieldItemListComputedInterface) {
+      // populate the computed list with values as there are no initial values
+      // to set.
+      $property->computeValue();
     }
     return $property;
   }
diff --git a/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php b/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php
index 03aca20992..004440b409 100644
--- a/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php
+++ b/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php
@@ -2,16 +2,33 @@
 
 namespace Drupal\field_computed_test\Plugin\Field\FieldType;
 
-use Drupal\Core\Field\FieldItemListComputed;
+use Drupal\Core\Field\FieldItemList;
+use Drupal\Core\Field\FieldItemListComputedInterface;
 
 /**
  * Represents a configurable dice result.
  */
-class DiceItemList extends FieldItemListComputed {
+class DiceItemList extends FieldItemList implements FieldItemListComputedInterface {
 
   /**
    * {@inheritdoc}
    */
+  public function computeValue() {
+    $this->list = [];
+    $values = $this->computeItemValues();
+    if (is_array($values) && !empty($values)) {
+      foreach ($values as $delta => $value) {
+        $this->list[] = $this->createItem($delta, $value);
+      }
+    }
+  }
+
+  /**
+   * This should compute the values that are used to create the field items.
+   *
+   * @return array
+   *   The values for the field items.
+   */
   protected function computeItemValues() {
     $items_count = $this->getEntity()->field_dice_count->value;
     $values = [];