diff --git a/core/lib/Drupal/Core/Config/Schema/Sequence.php b/core/lib/Drupal/Core/Config/Schema/Sequence.php
index e1f0704..f49c9ac 100644
--- a/core/lib/Drupal/Core/Config/Schema/Sequence.php
+++ b/core/lib/Drupal/Core/Config/Schema/Sequence.php
@@ -92,7 +92,7 @@ public function set($index, $item) {
   /**
    * {@inheritdoc}
    */
-  public function getArray() {
+  public function toArray() {
     return $this->getElements();
   }
 
diff --git a/core/lib/Drupal/Core/TypedData/ListInterface.php b/core/lib/Drupal/Core/TypedData/ListInterface.php
index 4a270d5..3555dd9 100644
--- a/core/lib/Drupal/Core/TypedData/ListInterface.php
+++ b/core/lib/Drupal/Core/TypedData/ListInterface.php
@@ -95,7 +95,7 @@ public function first();
     *
     * @return array
     */
-  public function getArray();
+  public function toArray();
 
   /**
   * Sets the array of list items.
diff --git a/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php b/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php
index 8fbe434..1721bdc 100644
--- a/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php
+++ b/core/lib/Drupal/Core/TypedData/Plugin/DataType/ItemList.php
@@ -254,7 +254,7 @@ public function __clone() {
   /**
    * {@inheritdoc}
    */
-  public function getArray() {
+  public function toArray() {
     return $this->list;
   }