private List<DefinitionModel> convertDtoListToModel(List<DefinitionDto> list) {
        List<DefinitionModel> definitions = new ArrayList<>();
        for(DefinitionDto dto : list) {
            definitions.add(new DefinitionModel(dto));
        }
        return definitions;
    }

 private List<DefinitionModel> convertDtoListToModel(List<DefinitionDto> list) {
        return list
            .stream()
            .map(e -> new DefinitionModel(e))
            .collect(Collectors.toList());
    }