/// <summary>
 /// Creates a subscription for the specified notification type to be delivered
 /// to the specified destination. Before you can subscribe, you must first
 /// create the destination by calling the createDestination operation.
 ///
 /// **Usage Plan:**
 ///
 /// | Rate (requests per second) | Burst |
 /// | ---- | ---- |
 /// | 1 | 5 |
 ///
 /// For more information, see "Usage Plans and Rate Limits" in the Selling
 /// Partner API documentation.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='body'>
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <CreateSubscriptionResponse> CreateSubscriptionAsync(this INotificationsClient operations, CreateSubscriptionRequest body, CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.CreateSubscriptionWithHttpMessagesAsync(body, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }