anchor.diff:          elif RuntimeInformation.IsOSPlatform(OSPlatform.OSX) then
               System.Diagnostics.Process.Start("open", path) |> ignore
           else
  -            invalidOp "Not supported OS platform"        
  +            invalidOp "Not supported OS platform"
   
   type Options = Layout
   
  
positive.code:     let serializeTraces names (traces:seq<Trace>) =
          match names with
          | None -> traces
          | Some names ->            
              traces
              |> Seq.mapi (fun i trace ->
                  trace.name <- Seq.item i names
  
negative.code: 
  type Chart =
  
      static member Plot(data) =
          let chart = PlotlyChart()
          chart.Plot [data]
          chart
  
      static member Plot(data:seq<#Trace>) =
          let chart = PlotlyChart()
          chart.Plot data
          chart
  