/// <summary>
 /// Lists virtual-machine-sizes available to be used for a virtual
 /// machine.
 /// </summary>
 /// <param name='operations'>
 /// Reference to the
 /// Microsoft.Azure.Management.Compute.IVirtualMachineOperations.
 /// </param>
 /// <param name='resourceGroupName'>
 /// Required. The name of the resource group.
 /// </param>
 /// <param name='vmName'>
 /// Required. The name of the virtual machine.
 /// </param>
 /// <returns>
 /// The List Virtual Machine operation response.
 /// </returns>
 public static Task <VirtualMachineSizeListResponse> ListAvailableSizesAsync(this IVirtualMachineOperations operations, string resourceGroupName, string vmName)
 {
     return(operations.ListAvailableSizesAsync(resourceGroupName, vmName, CancellationToken.None));
 }