Issue #3506574 by tim bozeman: Private methods throwing an error

src/Asset.php

@@ -15,15 +15,11 @@ use Drupal\component_library\Entity\ComponentLibraryAsset;
  */
 class Asset {
 
-  private FileSystemInterface $fileSystem;
-  private ConfigFactoryInterface $configFactory;
-  private LibraryDiscoveryInterface $libraryDiscovery;
-
-  public function __construct(FileSystemInterface $file_system, LibraryDiscoveryInterface $library_discovery, ConfigFactoryInterface $config_factory) {
-    $this->fileSystem = $file_system;
-    $this->configFactory = $config_factory;
-    $this->libraryDiscovery = $library_discovery;
-  }
+  public function __construct(
+    protected FileSystemInterface $fileSystem,
+    protected LibraryDiscoveryInterface $libraryDiscovery,
+    protected ConfigFactoryInterface $configFactory,
+  ) {}
 
   /**
    * Generate library files.