/// <summary>
/// List all the subscriptions under a specified topic.
/// <see href="https://msdn.microsoft.com/en-us/library/azure/mt639400.aspx" />
/// </summary>
/// <param name='operations'>
/// The operations group for this extension method.
/// </param>
/// <param name='resourceGroupName'>
/// Name of the Resource group within the Azure subscription.
/// </param>
/// <param name='namespaceName'>
/// The namespace name
/// </param>
/// <param name='topicName'>
/// The topic name.
/// </param>
/// <param name='skip'>
/// Skip is only used if a previous operation returned a partial result. If a
/// previous response contains a nextLink element, the value of the nextLink
/// element will include a skip parameter that specifies a starting point to
/// use for subsequent calls.
/// </param>
/// <param name='top'>
/// May be used to limit the number of results to the most recent N
/// usageDetails.
/// </param>
public static IPage <SBSubscription> ListByTopic(this ISubscriptionsOperations operations, string resourceGroupName, string namespaceName, string topicName, int?skip = default(int?), int?top = default(int?))
{
return(operations.ListByTopicAsync(resourceGroupName, namespaceName, topicName, skip, top).GetAwaiter().GetResult());
}