anchor.diff:  
   let internal getJourneyDetailsFromHtml platform due html = 
       createDoc html
  -    |> descendants "ul"
  -    |> Seq.collect (fun ul -> ul |> elements "li")
  +    |> descendants "li"
       |> Seq.map (rowToJourneyElement platform due)
       |> Seq.toArray
   
  
positive.code: 
  let internal getDeparturesFromHtml html callingAtFilter synchronizationContext token = 
      createDoc html
      |> descendants "ul"
      |> Seq.collect (fun ul -> ul |> elements "li")
      |> Seq.mapi (rowToDeparture callingAtFilter synchronizationContext token)
      |> Seq.toArray
  
  
negative.code:         let getArrivals() = 
              try 
                  createDoc html
                  |> descendants "li"
                  |> Seq.map rowToArrival
                  |> Seq.toArray
              with 
  