drupal_theme_rebuild example

/** * Tests deprecated drupal_theme_rebuild() function. * * @see drupal_theme_rebuild() * @group legacy */
  public function testLegacyThemeRegistryRebuild() {
    $registry = \Drupal::service('theme.registry');
    $runtime = $registry->getRuntime();
    $hooks = $registry->get();
    $this->expectDeprecation('drupal_theme_rebuild() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Use theme.registry service reset() method instead. See https://www.drupal.org/node/3348853');
    drupal_theme_rebuild();
    $this->assertNotSame($runtime, $registry->getRuntime());
    $this->assertSame($hooks, $registry->get());
  }

  /** * Tests deprecated theme_get_registry function. * * @see theme_get_registry() * @group legacy */
  public function testLegacyThemeGetRegistry() {