/** @return */
 public List<PostponedActivitiesResultDTO> getStatsByPostponedActivities() {
   return activityStatisticsUtils.getForPostponedActivities();
 }
 /** @return */
 public List<CompletedActivitiesStatisticsDTO> getPerformanceStatsByTeamLead() {
   return activityStatisticsUtils.getPerformanceStatsByTeamLead();
 }
 /** @return */
 public List<CompletedActivitiesStatisticsDTO> getStatsForCompletedActivities() {
   return activityStatisticsUtils.getForCompletedActivies();
 }