anchor.diff:  
     member inline Zero: unit -> WithLog<unit>
   
  -/// Builder for running a parallel computations with a log.
  +/// Builder for running a parallel computation with a log.
   type [<Class>] RunWithLogBuilder =
     inherit WithLogBuilder
     member Run: WithLog<'x> -> Job<'x>
  
positive.code: 
  /// Builder for parallel computations with a log.  A computation with a log is
  /// executed in a context with a log for logging individual logged computations.
  type WithLogBuilder =
    new: unit -> WithLogBuilder
  
  
negative.code:   val logAs: id: string -> LogAsBuilder
  
    /// Returns a builder for creating a new logged computation.  The computation
    /// is given an automatically determined identity based on the identity of the
    /// surrounding computation.  Otherwise the computation behaves just like a
    /// computation defined with `logAs`.
    val log: LogBuilder
  
    /// Returns a computation that logs the given value as a dependency.
  