/// <summary>
 /// Checks whether the deployment exists.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='resourceGroupName'>
 /// The name of the resource group with the deployment to check. The name is
 /// case insensitive.
 /// </param>
 /// <param name='deploymentName'>
 /// The name of the deployment to check.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <bool> CheckExistenceAsync(this IDeploymentsOperations operations, string resourceGroupName, string deploymentName, CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.CheckExistenceWithHttpMessagesAsync(resourceGroupName, deploymentName, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }