/// <summary>
 /// Lists all the container registries under the specified resource group.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The name of the resource group to which the container registry belongs.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <IPage <RegistryInner> > ListByResourceGroupAsync(this IRegistriesOperations operations, string resourceGroupName, CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.ListByResourceGroupWithHttpMessagesAsync(resourceGroupName, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }