code: def _get_id2obj_high(self, id2obj_user, id_sources, fnc_fill):
          
          for idid_user in id_sources:
              idobj_user = self.id2obj_all[idid_user]
              fnc_fill(id2obj_user, idobj_user)
              id2obj_user[idobj_user.item_id] = idobj_user
              if idid_user != idobj_user.item_id:
                  id2obj_user[idid_user] = idobj_user
docs: Get id2obj containing: id_srcs and parents.