RoboPackage::getRequiredApplications

private function getRequiredApplications(Tpl $tpl)
{
	$types = $tpl->getUsedActivityTypes();
	$apps = [];

	foreach ($types as $type)
	{
		if (mb_strpos($type, 'rest_') === 0)
		{
			$apps[] = $type;
		}
	}

	//TODO get app external id`s

	return $apps;
}