public ThemeManager::alter($type, &$data, &$context1 = NULL, &$context2

The extensions that might be attaching assets. Type:

protected ThemeManager::initTheme(RouteMatchInterface $route_match = NULL)

The app root. Type: string File core/lib/Drupal/Core/Theme/Registry

The theme registry used to render an output. Type:

public ThemeManagerInterface::resetActiveTheme()

public ThemeManager::__construct($root, ThemeNegotiatorInterface $theme_negotiator

public Registry::get() Returns the complete

The theme handler. Type:

public ThemeManagerInterface::alter($type, &$data,