diff --git a/core/lib/Drupal/Core/Field/FieldItemList.php b/core/lib/Drupal/Core/Field/FieldItemList.php
index b6ffef722d..ea3e727e37 100644
--- a/core/lib/Drupal/Core/Field/FieldItemList.php
+++ b/core/lib/Drupal/Core/Field/FieldItemList.php
@@ -162,24 +162,17 @@ public function __unset($property_name) {
   /**
    * {@inheritdoc}
    */
-  public function isComputed(){
+  public function isComputed() {
     return $this instanceof FieldItemListComputedInterface;
   }
 
   /**
    * {@inheritdoc}
    */
-  public function __construct(DataDefinitionInterface $definition, $name = NULL, TypedDataInterface $parent = NULL) {
-    parent::__construct($definition, $name, $parent);
-  }
-
-  /**
-   * {@inheritdoc
-   */
-  public function getComputedValues(){
+  public function setComputedValues() {
     $this->list = $this->computeValues();
     $errors = $this->validate()->getIterator();
-    if($errors->current()){
+    if ($errors->current()) {
       throw new FieldException($errors->current()->getMessage());
     }
   }
diff --git a/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php b/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php
index 98b364add2..cb8cd21f13 100644
--- a/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php
+++ b/core/lib/Drupal/Core/Field/FieldItemListComputedInterface.php
@@ -13,15 +13,8 @@
    * This will populate the field item list with computed values.
    *
    * @return \Drupal\Core\TypedData\TypedDataInterface[]
+   *   An array containing the field item values.
    */
   public function computeValues();
 
-  /**
-   * Determines if the field item List is computed.
-   *
-   * @return boolean
-   *   TRUE if the field item list is computed.
-   */
-  public function isComputed();
-
 }
diff --git a/core/lib/Drupal/Core/Field/FieldItemListInterface.php b/core/lib/Drupal/Core/Field/FieldItemListInterface.php
index c350432e21..562d8457c8 100644
--- a/core/lib/Drupal/Core/Field/FieldItemListInterface.php
+++ b/core/lib/Drupal/Core/Field/FieldItemListInterface.php
@@ -125,6 +125,19 @@ public function __isset($property_name);
   public function __unset($property_name);
 
   /**
+   * Determines if the field item List is computed.
+   *
+   * @return bool
+   *   TRUE if the field item list is computed.
+   */
+  public function isComputed();
+
+  /**
+   * Populate the computed list with values.
+   */
+  public function setComputedValues();
+
+  /**
    * Defines custom presave behavior for field values.
    *
    * This method is called during the process of saving an entity, just before
diff --git a/core/lib/Drupal/Core/TypedData/TypedDataManager.php b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
index 80b5d4a46c..d939de027c 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataManager.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
@@ -202,9 +202,9 @@ public function getPropertyInstance(TypedDataInterface $object, $property_name,
       $property->setValue($value, FALSE);
     }
     elseif ($property instanceof FieldItemListComputedInterface) {
-      // populate the computed list with values as there are no initial values
+      // Populate the computed list with values as there are no initial values
       // to set.
-      $property->getComputedValues();
+      $property->setComputedValues();
     }
     return $property;
   }