code: def _get_order_clause(archive_table):
      
      order_clause = [
          sa.asc(getattr(archive_table, col_name)) for col_name in archive_table._version_col_names
      ]
      order_clause.append(sa.asc(archive_table.version_id))
      return order_clause
docs: Returns an ascending order clause on the versioned unique constraint as well as the
      version column.