Issue #3281405 by Theresa.Grannum: Add @internal to Automatic Updates validator classes

src/Validator/CronFrequencyValidator.php

@@ -15,6 +15,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
  * Validates that cron runs frequently enough to perform automatic updates.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 class CronFrequencyValidator implements EventSubscriberInterface {
 

src/Validator/InstalledVersionValidator.php

@@ -13,6 +13,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
  * Validates that the site can update from the installed version of Drupal.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 class InstalledVersionValidator implements EventSubscriberInterface {
 

src/Validator/PackageManagerReadinessCheck.php

@@ -12,6 +12,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  * This class exists to facilitate re-use of Package Manager's stage validators
  * during update readiness checks, in addition to whatever events they normally
  * subscribe to.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 class PackageManagerReadinessCheck implements EventSubscriberInterface {
 

src/Validator/SettingsValidator.php

@@ -11,6 +11,11 @@ use Drupal\package_manager\Event\PreCreateEvent;
 use Drupal\package_manager\Event\PreOperationStageEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
+/**
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
+ */
 class SettingsValidator implements EventSubscriberInterface {
 
   use StringTranslationTrait;

src/Validator/StagedDatabaseUpdateValidator.php

@@ -14,6 +14,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
  * Validates that there are no database updates in a staged update.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 class StagedDatabaseUpdateValidator implements EventSubscriberInterface {
 

src/Validator/StagedProjectsValidator.php

@@ -11,6 +11,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
  * Validates the staged Drupal projects.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 final class StagedProjectsValidator implements EventSubscriberInterface {
 

src/Validator/UpdateReleaseValidator.php

@@ -10,6 +10,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
  * Validates that the target release of Drupal core is secure and supported.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 class UpdateReleaseValidator implements EventSubscriberInterface {
 

src/Validator/XdebugValidator.php

@@ -8,6 +8,10 @@ use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
 /**
  * Flags a warning if Xdebug is enabled.
+ *
+ * @internal
+ *   This class is an internal part of the module's update handling and
+ *   should not be used by external code.
  */
 class XdebugValidator implements EventSubscriberInterface {