anchor.diff:  
       let EmitInterface flavor (i:Browser.Interface) =
           Pt.ClearStack()
  -        EmitInterfaceEventMap flavor i
  +        EmitInterfaceEventMap i
   
           Pt.ResetIndent()
           EmitInterfaceDeclaration i
  
positive.code:         match GetGlobalPollutor flavor with
          | Some gp ->
              EmitAllMembers flavor gp
              EmitEventHandlers flavor "declare var " gp
          | _ -> ()
  
          EmitTypeDefs flavor
  
negative.code:         let output = StringBuilder()
          let stack = StringBuilder()
          let mutable curTabCount = 0
          member __.GetCurIndent() = String.replicate curTabCount "    "
  
          member __.Print content = Printf.kprintf (output.Append >> ignore) content
  
          member __.PrintToStack content = Printf.kprintf (stack.Append >> ignore) content
  
          member __.ClearStack () = stack.Clear() |> ignore
  
          member this.PrintStackContent () = this.Print "%s" (stack.ToString())
  
  