public IEnumerable<ScrumThemeServiceModel> getThemesByKeywordDescription(string text)
        {
            ScrumThemeRepository repo = new ScrumThemeRepository(entities);
            IEnumerable<ScrumTheme> themes = repo.getThemesByKewordDescription(text);
            List<ScrumThemeServiceModel> models = new List<ScrumThemeServiceModel>();

            foreach (ScrumTheme theme in themes) {
                models.Add(ScrumUtil.mapScrumThemeEntityToModel(theme));
            }

            return models;
        }