code: def user(self, obj, with_user_activity=False, follow_flag=None, **kwargs):
          
          q = Q()
          qs = self.public()
  
          if not obj:
              return qs.none()
  
          check(obj)
  
          if with_user_activity:
              q = q | Q(
                  actor_content_type=ContentType.objects.get_for_model(obj),
                  actor_object_id=obj.pk
              )
  
          follows = apps.get_model('actstream', 'follow').objects.filter(user=obj)
          if follow_flag:
              follows = follows.filter(flag=follow_flag)
              
          content_types = ContentType.objects.filter(
              pk__in=follows.values('content_type_id')
          )
  
          if not (content_types.exists() or with_user_activity):
              return qs.none()
  
          for content_type in content_types:
              object_ids = follows.filter(content_type=content_type)
              q = q | Q(
                  actor_content_type=content_type,
                  actor_object_id__in=object_ids.values('object_id')
              ) | Q(
                  target_content_type=content_type,
                  target_object_id__in=object_ids.filter(
                      actor_only=False).values('object_id')
              ) | Q(
                  action_object_content_type=content_type,
                  action_object_object_id__in=object_ids.filter(
                      actor_only=False).values('object_id')
              )
  
          return qs.filter(q, **kwargs)
docs: Create a stream of the most recent actions by objects that the user is following.