/// <summary>
/// Gets all subscribtions for given notification.
/// TODO: Can work only for single database approach!
/// </summary>
/// <param name="notificationSubscriptionManager">Notification subscription manager</param>
/// <param name="notificationName">Name of the notification.</param>
/// <param name="entityIdentifier">entity identifier</param>
public static List <NotificationSubscription> GetSubscriptions(
this INotificationSubscriptionManager notificationSubscriptionManager, string notificationName,
EntityIdentifier entityIdentifier = null)
{
return
(AsyncHelper.RunSync(
() => notificationSubscriptionManager.GetSubscriptionsAsync(notificationName, entityIdentifier)));
}