/// <summary>
/// Unsubscribes from a push request.
/// </summary>
/// <param name="pushRequestSubscriptionManager">Push request subscription manager</param>
/// <param name="user">User.</param>
/// <param name="pushRequestName">Name of the push request.</param>
/// <param name="entityIdentifier">entity identifier</param>
public static void Unsubscribe(this IPushRequestSubscriptionManager pushRequestSubscriptionManager, UserIdentifier user, string pushRequestName, EntityIdentifier entityIdentifier = null)
{
AsyncHelper.RunSync(() => pushRequestSubscriptionManager.UnsubscribeAsync(user, pushRequestName, entityIdentifier));
}
