/// <summary>
 /// Creates or updates a disk.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The name of the resource group.
 /// </param>
 /// <param name='diskName'>
 /// The name of the managed disk that is being created. The name can't be
 /// changed after the disk is created. Supported characters for the name are
 /// a-z, A-Z, 0-9 and _. The maximum name length is 80 characters.
 /// </param>
 /// <param name='disk'>
 /// Disk object supplied in the body of the Put disk operation.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <DiskInner> CreateOrUpdateAsync(this IDisksOperations operations, string resourceGroupName, string diskName, DiskInner disk, CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.CreateOrUpdateWithHttpMessagesAsync(resourceGroupName, diskName, disk, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }