Name Type Location Description
CoreUpdater::isInstalled function core/modules/system/system.updater.inc Checks if the project is installed.
ThemeUpdater::isInstalled function core/modules/system/system.updater.inc Checks if the project is installed.
LayoutUpdater::isInstalled function core/modules/system/system.updater.inc Checks if the project is installed.
ModuleUpdater::isInstalled function core/modules/system/system.updater.inc Checks if the project is installed.
BackdropUpdaterInterface::isInstalled function core/includes/updater.inc Checks if the project is installed.