code: def getTaskTypes(self):
          
          types = [
              ('Calibration', safe_unicode(_('Calibration')).encode('utf-8')),
              ('Enhancement', safe_unicode(_('Enhancement')).encode('utf-8')),
              ('Preventive', safe_unicode(_('Preventive')).encode('utf-8')),
              ('Repair', safe_unicode(_('Repair')).encode('utf-8')),
              ('Validation', safe_unicode(_('Validation')).encode('utf-8')),
          ]
  
          return DisplayList(types)
docs: Return the current list of task types