DBServer::GetFarmRoleObject PHP Method

    public function GetFarmRoleObject()
    {
        if (!$this->dbFarmRole) {
            $this->dbFarmRole = DBFarmRole::LoadByID($this->farmRoleId);
        }
        return $this->dbFarmRole;
    }

 public static function setupScalrAgent(\DBServer $dbServer)
 {
     $baseurl = \Scalr::config('scalr.endpoint.scheme') . "://" . \Scalr::config('scalr.endpoint.host');
     $env = $dbServer->GetEnvironmentObject();
     $azure = $env->azure();
     $branch = $dbServer->getScalarizrRepository()['repository'];
     $develRepos = \Scalr::getContainer()->config->get('scalr.scalarizr_update.devel_repos');
     $scmBranch = $dbServer->GetFarmRoleObject()->GetSetting('user-data.scm_branch');
     if ($scmBranch != '' && $develRepos) {
         $branch = $dbServer->GetFarmRoleObject()->GetSetting('base.devel_repository');
         $scmBranch = "{$scmBranch}/";
     } else {
         $scmBranch = '';
     }
     if ($dbServer->osType == 'linux') {
         $extensionProperties = new ResourceExtensionProperties('Microsoft.OSTCExtensions', 'CustomScriptForLinux', '1.2');
         $extensionProperties->setSettings(['commandToExecute' => "bash -c 'curl -k -L \"{$baseurl}/public/linux/{$branch}/azure/{$scmBranch}install_scalarizr.sh\" | bash && service scalr-upd-client start'"]);
     } else {
         $extensionProperties = new ResourceExtensionProperties('Microsoft.Compute', 'CustomScriptExtension', '1.4');
         $extensionProperties->setSettings(["commandToExecute" => "powershell -NoProfile -ExecutionPolicy Bypass -Command \"iex ((new-object net.webclient).DownloadString('{$baseurl}/public/windows/{$branch}/{$scmBranch}install_scalarizr.ps1')); start-service ScalrUpdClient\""]);
     }
     $createExtension = new CreateResourceExtension('scalarizr', $dbServer->cloudLocation, $extensionProperties);
     try {
         $response = $azure->compute->resourceExtension->create($env->keychain(SERVER_PLATFORMS::AZURE)->properties[Entity\CloudCredentialsProperty::AZURE_SUBSCRIPTION_ID], $dbServer->GetProperty(\AZURE_SERVER_PROPERTIES::RESOURCE_GROUP), $dbServer->GetProperty(\AZURE_SERVER_PROPERTIES::SERVER_NAME), $createExtension);
         \Scalr::getContainer()->logger(\LOG_CATEGORY::FARM)->info(new \FarmLogMessage($dbServer, sprintf(_("Created azure resource extension to install and launch scalr agent"))));
         $dbServer->SetProperty(\AZURE_SERVER_PROPERTIES::SZR_EXTENSION_DEPLOYED, 1);
     } catch (\Exception $e) {
         \Scalr::getContainer()->logger(\LOG_CATEGORY::FARM)->fatal(new \FarmLogMessage($dbServer, sprintf(_("Unable to create azure resource extension to install and launch scalr agent: %s"), $e->getMessage())));
     }
 }