/// <summary>
/// Starts a rolling upgrade to move all extensions for all virtual machine
/// scale set instances to the latest available extension version. Instances
/// which are already running the latest extension versions are not affected.
/// </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='cancellationToken'>
/// The cancellation token.
/// </param>
public static async Task BeginStartExtensionUpgradeAsync(this IVirtualMachineScaleSetRollingUpgradesOperations operations, string resourceGroupName, string vmScaleSetName, CancellationToken cancellationToken = default(CancellationToken))
{
(await operations.BeginStartExtensionUpgradeWithHttpMessagesAsync(resourceGroupName, vmScaleSetName, null, cancellationToken).ConfigureAwait(false)).Dispose();
}
