public ModuleHandler::getModuleList() Returns

List of installed modules. Type: \Drupal\Core\Extension\Extension[] File

public ModuleHandler::moduleExists($module)

public ModuleHandler::loadAll() Loads

public ModuleHandler::getImplementations($hook)

List of alter hook implementations keyed by hook name(s). Type:

public ModuleHandler::writeCache() Write

public ModuleHandler::getModule($name)

Cache backend for storing module hook implementation information. Type:

protected ModuleHandler::buildImplementationInfo($hook)