anchor.diff:              this
   
       //
  -    member __.Iter (action : 'T1 -> 'T2 -> unit) : unit =
  +    member __.Iterate (action : 'T1 -> 'T2 -> unit) : unit =
           Map.iter action left
   
       //
  
positive.code:         // Preconditions
          checkNonNull "bimap" bimap
  
          bimap.Iter action
  
      //
      [<CompiledName("Fold")>]
  
negative.code: //
  namespace ExtCore.Collections
  
  open System.Collections.Generic
  open System.Diagnostics
  open LanguagePrimitives
  open OptimizedClosures
  