code: def setActivities(self, *args, **kwargs):
          
          def activityDate(activity):
              """Util function used for sorting activities according to timestamp"""
              try:
                  return activity['activity']['timestamp']
              except KeyError as kerr:
                  return None
          try:
              activities = self.mambuactivitiesclass(groupId=self['encodedKey'], *args, **kwargs)
          except AttributeError as ae:
              from .mambuactivity import MambuActivities
              self.mambuactivitiesclass = MambuActivities
              activities = self.mambuactivitiesclass(groupId=self['encodedKey'], *args, **kwargs)
  
          activities.attrs = sorted(activities.attrs, key=activityDate)
          self['activities'] = activities
  
          return 1
docs: Adds the activities for this group to a 'activities' field.
  
          Activities are MambuActivity objects.
  
          Activities get sorted by activity timestamp.
  
          Returns the number of requests done to Mambu.