anchor.diff:    CompareDictionaries(expected, actual);
   end;
   
  -procedure testETL.Transforms_one_value;
  +procedure testETL.A_single_letter;
   var aList: TList<string>;
       old: TDictionary<integer, TList<string>>;
       expected: TDictionary<string, integer>;
  
positive.code: interface
  uses
    System.Generics.Collections, DUnitX.TestFramework;
  
  type
  
  
negative.code:   CompareDictionaries(expected, ETL.Transform(old));
  end;
  
  procedure testETL.Single_score_with_multiple_letters;
  var aList: TList<string>;
      old: TDictionary<integer, TList<string>>;
      expected: TDictionary<string, integer>;
  