private void findArgumentWords(List<StepModel> steps, List<Word> arguments) {
        for (StepModel step : steps) {
            for (Word word : step.getWords()) {
                if (word.isArg()) {
                    arguments.add(word);
                }
            }
            findArgumentWords(step.getNestedSteps(), arguments);
        }
    }
Returns a list with argument words that are not equal in all cases.
jgiven-core/src/main/java/com/tngtech/jgiven/report/analysis/CaseArgumentAnalyser.java