anchor.diff:    printfn "Result: %A" relationships
     visualize relationships
   
  -
  -    
  -do run()    
  -
  -
  +do run()
  +
  +
  
positive.code:               cr.MultiPartIdentifier 
                |> MultiPartIdentifier.FromCs 
                |> fun x ->
                  colRefs.Add (Ops.GetName x)
                })
    colRefs |> List.ofSeq
  
  
negative.code:     ret
  
  type JoinAnalyzer() =
    member val tableToAlias = Dictionary<string, string>()
    member val aliasToTable = Dictionary<string, string>()
    //member val mappings = Dictionary<string, string>()
  