How to use the duden.display.print_tree_of_strings function in duden

print(word.article)
    elif args.part_of_speech:
        if word.part_of_speech:
            print(word.part_of_speech)
    elif args.frequency:
        if word.frequency:
            print(word.frequency)
    elif args.usage:
        if word.usage:
            print(word.usage)
    elif args.word_separation:
        for part in word.word_separation:
            print(part)
    elif args.meaning_overview:
        if word.meaning_overview:
            print_tree_of_strings(word.meaning_overview)
    elif args.synonyms:
        synonyms = word.synonyms
        if synonyms:
            print_string_or_list(synonyms)
    elif args.origin:
        if word.origin:
            print(word.origin)
    elif args.compounds:
        if word.compounds:
            display_compounds(word, args.compounds)
    elif args.grammar:
        display_grammar(word, args.grammar)
    elif args.export:
        yaml_string = yaml.dump(word.export(),
                                sort_keys=False, allow_unicode=True)
        print(yaml_string, end='')