Provides the theme initialization logic. Hierarchy class \Drupal\Core\Theme\

The lock backend that should be used. Type:

public ThemeManager::alterForTheme(ActiveTheme $theme, $type, &$data

public ThemeManager::resetActiveTheme() Resets

Defines a theme negotiator that deals with the active theme on ajax requests. Many different pages can invoke an Ajax request to a generic Ajax

public ThemeManagerInterface::alterForTheme(ActiveTheme

public Registry::getPrefixGroupedUserFunctions() Gets

Exception to be thrown when base theme for installed theme is not installed. Hierarchy class

protected ThemeInitialization::prepareStylesheetsRemove(Extension

public MissingThemeDependencyException