Issue #3345535: Should BaseRequirementsFulfilledValidator listen to PreRequireEvent?

package_manager/src/Validator/SymlinkValidator.php

@@ -47,8 +47,9 @@ class SymlinkValidator implements EventSubscriberInterface {
    * Flags errors if the project root or stage directory contain symbolic links.
    */
   public function validate(PreOperationStageEvent $event): void {
-    if (get_class($event) === PreRequireEvent::class) {
-      // We don't want to check symlinks during PreRequireEvent.
+    if ($event instanceof PreRequireEvent) {
+      // We don't need to check symlinks again during PreRequireEvent; this was
+      // already just validated during PreCreateEvent.
       return;
     }
     $active_dir = $this->pathFactory->create($this->pathLocator->getProjectRoot());