core-bundle/src/Resources/contao/library/Contao/ModuleLoader.php
public static function getActive()
	{
		@trigger_error('Using ModuleLoader::getActive() has been deprecated and will no longer work in Contao 5.0.', E_USER_DEPRECATED);

		$bundles = array_keys(System::getContainer()->getParameter('kernel.bundles'));

		foreach (static::$legacy as $bundleName => $module)
		{
			if (\in_array($bundleName, $bundles))
			{
				$bundles[] = $module;
			}
		}

		return $bundles;
	}
public static function getActive()
	{
		@trigger_error('Using ModuleLoader::getActive() has been deprecated and will no longer work in Contao 5.0.', E_USER_DEPRECATED);

		$bundles = array_keys(System::getContainer()->getParameter('kernel.bundles'));

		foreach (static::$legacy as $bundleName => $module)
		{
			if (\in_array($bundleName, $bundles))
			{
				$bundles[] = $module;
			}
		}

		return $bundles;
	}
Return the active modules as array

@return array An array of active modules

@deprecated Deprecated since Contao 4.0, to be removed in Contao 5.