diff --git a/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php b/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php
index cdfe962..f5ba79b 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataManagerInterface.php
@@ -26,9 +26,9 @@
    *   The plugin configuration array, i.e. an array with the following keys:
    *   - data_definition: The data definition object, i.e. an instance of
    *     \Drupal\Core\TypedData\DataDefinitionInterface.
-   *   - name: (optional) If a property or list item is to be created, the name
+   *   - name: If a property or list item is to be created, the name
    *     of the property or the delta of the list item.
-   *   - parent: (optional) If a property or list item is to be created, the
+   *   - parent: If a property or list item is to be created, the
    *     parent typed data object implementing either the ListInterface or the
    *     ComplexDataInterface.
    *