/// <summary>
 /// Retrives a <see cref="ThreadSubscription"/> for the provided thread id.
 /// </summary>
 /// <param name="id">The Id of the thread to retrieve subscription status.</param>
 /// <remarks>http://developer.github.com/v3/activity/notifications/#get-a-thread-subscription</remarks>
 /// <returns>A <see cref="ThreadSubscription"/> for the chosen thread.</returns>
 public IObservable <ThreadSubscription> GetThreadSubscription(int id)
 {
     return(_notificationsClient.GetThreadSubscription(id).ToObservable());
 }