/// <summary>
 /// Upgrades one or more virtual machines to the latest SKU set in the VM scale
 /// set model.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The name of the resource group.
 /// </param>
 /// <param name='vmScaleSetName'>
 /// The name of the VM scale set.
 /// </param>
 /// <param name='instanceIds'>
 /// The virtual machine scale set instance ids.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <OperationStatusResponseInner> BeginUpdateInstancesAsync(this IVirtualMachineScaleSetsOperations operations, string resourceGroupName, string vmScaleSetName, IList <string> instanceIds, CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.BeginUpdateInstancesWithHttpMessagesAsync(resourceGroupName, vmScaleSetName, instanceIds, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }
 /// <summary>
 /// Upgrades one or more virtual machines to the latest SKU set in the VM scale
 /// set model.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The name of the resource group.
 /// </param>
 /// <param name='vmScaleSetName'>
 /// The name of the VM scale set.
 /// </param>
 /// <param name='instanceIds'>
 /// The virtual machine scale set instance ids.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task BeginUpdateInstancesAsync(this IVirtualMachineScaleSetsOperations operations, string resourceGroupName, string vmScaleSetName, IList <string> instanceIds, CancellationToken cancellationToken = default(CancellationToken))
 {
     (await operations.BeginUpdateInstancesWithHttpMessagesAsync(resourceGroupName, vmScaleSetName, instanceIds, null, cancellationToken).ConfigureAwait(false)).Dispose();
 }