public SaveProjectActivityUnits(List<TransitLPActivityUnit> activitiesToSave) {
   ProjectService.Util.getInstance()
       .setActivityUnitsFromCategory(projectID, transitCategory.getId(), activitiesToSave, this);
 }
 public FetchProjectActivityUnits() {
   ProjectService.Util.getInstance()
       .getActivityUnitsForCategory(projectID, transitCategory.getId(), this);
 }