Default theme implementation for a progress bar. Note that the core Batch API uses this only for non-JavaScript batch jobs.

Default theme implementation for a breadcrumb trail. Available variables: breadcrumb:

Default theme implementation for an administrative page. Available variables: system_compact_link:

public RegionalForm::submitForm(array &$form, FormStateInterface

Provides a form for uninstalling modules. Hierarchy class \Drupal\Core\Form\

Site config object. Type:

Default theme implementation of a datetime form element. Available variables: attributes:

public static ThemeSettingsForm::create(ContainerInterface

Requirement severity -- Requirement successfully met. File core/modules/system/src/SystemManager.php

template_preprocess_admin_block_content(&$variables) Prepares variables for administrative content block