anchor.diff:          /// </summary>
           /// <param name="cloudWorkflow">Cloud workflow to be executed.</param>
           /// <param name="ctx">Local execution context.</param>
  -        static member StartImmediate(cloudWorkflow : Cloud<'T>, ctx : Context<'T>) = let (Body f) = cloudWorkflow in f ctx
  +        static member StartImmediate(cloudWorkflow : Cloud<'T>, ctx : Context<'T>) : unit = 
  +            let (Body f) = cloudWorkflow in f ctx
   
           /// <summary>
           ///     Starts provided cloud workflow in the thread pool.
  
positive.code:         ///     Cloud.Choice combinator
          /// </summary>
          /// <param name="computations">Input computations to be executed in parallel.</param>
          static member Choice (computations : seq<Cloud<'T option>>) = cloud {
              let! runtime = Cloud.GetResource<IRuntimeProvider> ()
              return! runtime.ScheduleChoice computations
          }
  
negative.code:         /// <summary>
          ///     Gets the current cancellation token.
          /// </summary>
          static member CancellationToken = 
              Body(fun ctx -> if ctx.IsCancellationRequested then ctx.Cancel() else ctx.scont ctx.CancellationToken)
  
          /// <summary>
          ///     Raise an exception.
  