private void addToMap( Tag tag, ScenarioModel scenario ) {
        List<ScenarioModel> list = tagMap.computeIfAbsent(tag, k -> Lists.newArrayList());
        list.add(scenario);
    }
Represents the complete report model of all report files.
jgiven-core/src/main/java/com/tngtech/jgiven/report/model/CompleteReportModel.java