public ThemeHandler::addTheme(Extension $theme)

Type:

A list of all currently available themes. Type:

protected ModuleHandler::verifyImplementations(&$implementations

Origin directory weight: Installation profile. File core/lib/Drupal/Core/Extension/ExtensionDiscovery

public ModuleHandler::loadAllIncludes($type, $name = NULL)

Type: \Drupal\

public ThemeHandlerInterface::themeExists($theme)

public ModuleHandlerInterface::getName($module)

public ThemeInstallerInterface::install(array $theme_list