    # File lib/spec/story/runner/story_runner.rb, line 25
            def Story(title, narrative, params = {}, &body)
              story = Story.new(title, narrative, params, &body)
              @stories << story

              # collect scenarios
              collector = ScenarioCollector.new(story)
              story.run_in(collector)
              @scenarios += collector.scenarios
              @scenarios_by_story[story.title] = collector.scenarios
            end