docs: def before_insert(mapper, conn, target):
          """event.listen method for Sqlalchemy to set the sequence for this
          object and create an ObjectNumber value for the id_"""
  
          target._set_ids()
  
          if target.name and target.vname and target.cache_key and target.fqname and not target.dataset:
              return
  
          Partition.before_update(mapper, conn, target)