Prose\FromHost::getAppSetting PHP Method

    public function getAppSetting($path, $settingName = null)
    {
        // are we operating in legacy mode (for DataSift), or are we using
        // the new dot.notation.support that we want everywhere in v2?
        $parts = explode(".", $path);
        if (count($parts) === 1 && $settingName !== null) {
            return $this->getLegacyAppSetting($path, $settingName);
        }
        // if we get here, then we are using the new dot.notation.support
        // what are we doing?
        $log = usingLog()->startAction("get appSetting '{$path}' from host '{$this->args[0]}'");
        // make sure we have valid host details
        $hostDetails = $this->getHostDetails();
        // do we have any app settings?
        if (!isset($hostDetails->appSettings)) {
            $msg = "host has no appSettings at all";
            $log->endAction($msg);
            throw new E5xx_ActionFailed(__METHOD__, $msg);
        }
        // do we have the setting that we want?
        if (!$hostDetails->appSettings->hasData($path)) {
            $msg = "host does not have appSetting '{$path}'";
            throw new E5xx_ActionFailed(__METHOD__, $msg);
        }
        // success
        $data = $hostDetails->appSettings->getData($path);
        // all done
        $log->endAction(["setting is", $data]);
        return $data;
    }