/// <summary>
/// Create an <see cref="IObserver{T}">observer</see> that can be used to send messages to the specified actor.
/// </summary>
/// <typeparam name="TMessage">
/// The base message type that the observer accepts.
/// </typeparam>
/// <param name="actorRef">
/// A reference to the actor that observed messages will be forwarded to.
/// </param>
/// <returns>
/// The new observer.
/// </returns>
public static IObserver <TMessage> ToObserver <TMessage>(this IActorRef actorRef)
{
return(actorRef.ToObserver <TMessage>(stopOnCompletion: false));
}