diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
index 32c8266..ae4e6c0 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php
@@ -267,10 +267,8 @@ public function toArray() {
     /** @var \Drupal\Core\Config\Entity\ConfigEntityTypeInterface $entity_type */
     $entity_type = $this->getEntityType();
 
-    $properties_to_export = $this->_getPropertiesToExport();
-
     $id_key = $entity_type->getKey('id');
-    foreach ($properties_to_export as $property_name => $export_name) {
+    foreach ($this->getPropertiesToExport() as $property_name => $export_name) {
       // Special handling for IDs so that computed compound IDs work.
       // @see \Drupal\Core\Entity\EntityDisplayBase::id()
       if ($property_name == $id_key) {
@@ -293,7 +291,7 @@ public function toArray() {
   /**
    * {@inheritdoc}
    */
-  public function _getPropertiesToExport() {
+  public function getPropertiesToExport() {
     /** @var \Drupal\Core\Config\Entity\ConfigEntityTypeInterface $entity_type */
     $entity_type = $this->getEntityType();
 
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php
index 3bfb1ba..fcdaf5a 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityInterface.php
@@ -229,9 +229,7 @@ public function hasTrustedData();
    * @throws \Drupal\Core\Config\Schema\SchemaIncompleteException
    *   Exception thrown when there is no 'config_export' annotation and there is
    *   no config schema.
-   *
-   * @todo Remove underscore in Drupal 9.
    */
-  public function _getPropertiesToExport();
+  public function getPropertiesToExport();
 
 }
diff --git a/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php b/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
index 28540c7..2095f25 100644
--- a/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
+++ b/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
@@ -471,10 +471,9 @@ public function updateFromStorageRecord(ConfigEntityInterface $entity, array $va
 
     $data = $this->mapFromStorageRecords(array($values));
     $updated_entity = current($data);
-    $properties = $entity->_getPropertiesToExport();
 
     $uuid_key = $this->getEntityType()->getKey('uuid');
-    foreach ($properties as $property) {
+    foreach ($entity->getPropertiesToExport() as $property) {
       if ($property === $uuid_key) {
         // The UUID field should not be copied.
         continue;
diff --git a/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php b/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php
index 63786f5..852bda8 100644
--- a/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php
+++ b/core/modules/system/tests/src/Functional/Entity/ConfigEntityImportTest.php
@@ -187,16 +187,17 @@ protected function doThirdPartySettingsUpdate() {
     $entity->save();
 
     $this->assertIdentical([], $entity->getThirdPartyProviders());
-    $custom_data = $this->container->get('config.storage')->read($name);
+    // Get a copy of the configuration before the third party setting is added.
+    $no_third_part_setting_config = $this->container->get('config.storage')->read($name);
 
+    // Add a third party setting.
     $entity->setThirdPartySetting('config_test', 'integer', 1);
     $entity->save();
     $this->assertIdentical(1, $entity->getThirdPartySetting('config_test', 'integer'));
+    $has_third_part_setting_config = $this->container->get('config.storage')->read($name);
 
-    // Read the existing data, and prepare an altered version without third
-    // party settings.
-    $original_data = $this->container->get('config.storage')->read($name);
-    $this->assertConfigUpdateImport($name, $original_data, $custom_data);
+    // Ensure that a configuration import can remove a third party settings.
+    $this->assertConfigUpdateImport($name, $has_third_part_setting_config, $no_third_part_setting_config);
   }
 
   /**
diff --git a/core/modules/views_ui/src/ViewUI.php b/core/modules/views_ui/src/ViewUI.php
index 7af27f6..d0a6226 100644
--- a/core/modules/views_ui/src/ViewUI.php
+++ b/core/modules/views_ui/src/ViewUI.php
@@ -1351,8 +1351,8 @@ public function addCacheTags(array $cache_tags) {
   /**
    * @inheritDoc
    */
-  public function _getPropertiesToExport() {
-    return $this->storage->_getPropertiesToExport();
+  public function getPropertiesToExport() {
+    return $this->storage->getPropertiesToExport();
   }
 
 }