diff -u b/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php
--- b/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php
@@ -84,10 +84,6 @@
   /**
    * Returns whether this entity is being changed as part of an import process.
    *
-   * Code that makes changes to configuration or the entities that are being
-   * changed, but not imported entities that may already contain
-   * these changes, must check this method.
-   *
    * If you are writing code that responds to a change in this entity (insert,
    * update, delete, presave, etc.), and your code would result in a
    * configuration change (whether related to this configuration entity, another
@@ -106,7 +102,7 @@
    * that the storage tables are created or updated for the field configuration
    * entity, which is not a configuration change, and it must be done whether
    * due to an import or not. So, the first method should check
-   * $entity->isSynching() and skip executing if it returns TRUE, and the second
+   * $entity->isSyncing() and skip executing if it returns TRUE, and the second
    * should not perform this check.
    *
    * @return bool