public void write_previews()
        {
            var scenarios = FindScenarios();
            var writer    = new ScenarioWriter();

            scenarios.Each(x => {
                x.Preview(writer);
                writer.BlankLine();
                writer.BlankLine();
            });
        }
 public void write_a_blank_line()
 {
     writer.WriteLine("AAAAAAAAAAAAA");
     writer.BlankLine();
     writer.WriteLine("BBBBBBBBBBBBB");
 }