/**
  * Walks upgrade domains.
  * 
  * @command-name WalkUpgradeDomains
  * @command-description Walks upgrade domains.
  * @command-parameter-for $subscriptionId Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile|Microsoft_Console_Command_ParameterSource_Env --SubscriptionId|-sid Required. This is the Windows Azure Subscription Id to operate on.
  * @command-parameter-for $certificate Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile|Microsoft_Console_Command_ParameterSource_Env --Certificate|-cert Required. This is the .pem certificate that user has uploaded to Windows Azure subscription as Management Certificate.
  * @command-parameter-for $certificatePassphrase Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile --Passphrase|-p The certificate passphrase. If not specified, a prompt will be displayed.
  * @command-parameter-for $serviceName Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile|Microsoft_Console_Command_ParameterSource_Env|Microsoft_Console_Command_ParameterSource_StdIn --Name Required. The hosted service DNS name to operate on.
  * @command-parameter-for $deploymentSlot Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile --BySlot Required if deployment name is omitted. The slot to retrieve property information for.
  * @command-parameter-for $deploymentName Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile --ByName Required if deployment slot is omitted. The deployment name to retrieve property information for.
  * @command-parameter-for $upgradeDomain Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile --UpgradeDomain Required. The upgrade domain index.
  * @command-parameter-for $waitForOperation Microsoft_Console_Command_ParameterSource_Argv|Microsoft_Console_Command_ParameterSource_ConfigFile --WaitFor|-w Optional. Wait for the operation to complete?
  */
 public function walkUpgradeDomainsCommand($subscriptionId, $certificate, $certificatePassphrase, $serviceName, $deploymentSlot, $deploymentName, $upgradeDomain, $waitForOperation = false)
 {
     $client = new Microsoft_WindowsAzure_Management_Client($subscriptionId, $certificate, $certificatePassphrase);
     if (!is_null($deploymentSlot) && $deploymentSlot != '') {
         $deploymentSlot = strtolower($deploymentSlot);
         $client->walkUpgradeDomainBySlot($serviceName, $deploymentSlot, $upgradeDomain);
     } else {
         $client->walkUpgradeDomainByDeploymentId($serviceName, $deploymentName, $upgradeDomain);
     }
     if ($waitForOperation) {
         $client->waitForOperation();
     }
     echo $client->getLastRequestId();
 }