The menu description. Type: string File core/module

public SystemController::overview($link_id)

Default theme implementation for vertical tabs. Available variables attributes: A list

The MIME type guesser. Type: \Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesserInterface

template_preprocess_system_themes_page(&$variables) Prepares variables for appearance page templates.

system_user_timezone(&$form, FormStateInterface $form_state) Add the time zone field to the user edit and

public Menu::isLocked() Determines if

system_admin_compact_mode() Determines whether the current user is in compact mode. Compact

A cache backend interface. Type:

The request stack. Type: \Symfony\Component\HttpFoundation\RequestStack File