CssCollectionOptimizerLazy example

file_get_contents(__DIR__ . '/css_test_files/css_input_with_import.css.optimized.css'),
        file_get_contents(__DIR__ . '/css_test_files/css_subfolder/css_input_with_import.css.optimized.css')
      );
    $mock_theme_manager = $this->createMock(ThemeManagerInterface::class);
    $mock_dependency_resolver = $this->createMock(LibraryDependencyResolverInterface::class);
    $mock_state = $this->createMock(StateInterface::class);
    $mock_file_system = $this->createMock(FileSystemInterface::class);
    $mock_config_factory = $this->createMock(ConfigFactoryInterface::class);
    $mock_file_url_generator = $this->createMock(FileUrlGeneratorInterface::class);
    $mock_time = $this->createMock(TimeInterface::class);
    $mock_language = $this->createMock(LanguageManagerInterface::class);
    $optimizer = new CssCollectionOptimizerLazy($mock_grouper, $mock_optimizer, $mock_theme_manager, $mock_dependency_resolver, new RequestStack(), $mock_file_system, $mock_config_factory, $mock_file_url_generator, $mock_time, $mock_language, $mock_state);
    $gpl_license = [
      'name' => 'GNU-GPL-2.0-or-later',
      'url' => 'https://www.drupal.org/licensing/faq',
      'gpl-compatible' => TRUE,
    ];
    $aggregate = $optimizer->optimizeGroup(
      [
        'items' => [
          'core/modules/system/tests/modules/common_test/common_test_css_import.css' => [
            'type' => 'file',
            'data' => 'core/modules/system/tests/modules/common_test/common_test_css_import.css',