/**
  * @param interface_packagemanager_packagemanager $objPackage
  * @param string $strLatestVersion
  * @return void
  */
 private function sendUpdateAvailableMessage(interface_packagemanager_packagemanager $objPackage, $strLatestVersion)
 {
     //check, if not already sent
     $strIdentifier = sha1(__CLASS__ . $objPackage->getObjMetadata()->getStrTitle() . $strLatestVersion);
     if (count(class_module_messaging_message::getMessagesByIdentifier($strIdentifier)) == 0) {
         $strMailtext = class_carrier::getInstance()->getObjLang()->getLang("update_notification_package", "packagemanager") . " " . $objPackage->getObjMetadata()->getStrTitle() . "\n";
         $strMailtext .= class_carrier::getInstance()->getObjLang()->getLang("update_notification_verinst", "packagemanager") . " " . $objPackage->getObjMetadata()->getStrVersion() . "\n";
         $strMailtext .= class_carrier::getInstance()->getObjLang()->getLang("update_notification_verav", "packagemanager") . " " . $strLatestVersion . "\n";
         $objMessageHandler = new class_module_messaging_messagehandler();
         $objMessage = new class_module_messaging_message();
         $objMessage->setStrTitle(class_carrier::getInstance()->getObjLang()->getLang("update_notification_intro", "packagemanager"));
         $objMessage->setStrBody($strMailtext);
         $objMessage->setObjMessageProvider(new class_messageprovider_packageupdate());
         $objMessage->setStrInternalIdentifier($strIdentifier);
         $objMessageHandler->sendMessageObject($objMessage, new class_module_user_group(class_module_system_setting::getConfigValue("_admins_group_id_")));
     }
 }