The cache tag invalidator. Type:

public PlaceholderGenerator::__construct(array $rendere

hook_form_system_theme_settings_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state) Allow themes

Turns a render array into a HTML string. Hierarchy class \Drupal\Core\Render\

The render context: a stack containing bubbleable rendering metadata. A stack of

public MarkupInterface::__toString() Returns

Provides a form element for a set of checkboxes. Properties: #options: An associative

The title resolver. Type:

public Renderer::render(&$elements, $is_root_call = FALSE)

hook_preprocess(&$variables, $hook) Preprocess theme variables for templates. This