anchor.diff:      let spawnOpt (actorFactory : IActorRefFactory) (name : string) (f : Actor<'Message> -> Cont<obj, 'Returned>) 
           (options : SpawnOption list) : IActorRef = 
           let nf (shadAct : Akka.FSharp.Actors.Actor<obj>) =
  -            let act = Rpc.Actor<'Message>(shadAct)
  +            let act = Actor<'Message>(shadAct)
               f act
   
           let e = Linq.Expression.ToExpression(fun () -> new FunActor<obj, 'Returned>(nf))
  
positive.code: 
              x.AsyncResult req
  
  [<AutoOpen>]
  module Spawn =
      /// <summary>
      /// Spawns an actor using specified actor computation expression, with custom spawn option settings.
      /// The actor can only be used locally. 
  
negative.code: open System
  open Akka.Actor
  
  module Rpc =
  
  
  