code: def make_order_string(cls, order_specification):
          
          registry = get_current_registry()
          visitor_cls = registry.getUtility(IOrderSpecificationVisitor,
                                            name=EXPRESSION_KINDS.CQL)
          visitor = visitor_cls()
          order_specification.accept(visitor)
          return str(visitor.expression)
docs: Converts the given order specification to a CQL order expression.