JSExpression 中的 mock 属性如何消费

我看 parts 造物里的低代码组件可以消费 JSExpression 下的 mock

但是官方示例中无法消费：

想了解下这块是有什么开关要开启吗？

Compare how the Parts low-code components consume the mock property under JSExpression with the official example shown in the issue. Start by reproducing the discrepancy in both examples and determine whether a configuration switch is required; done means the official example consumes the mock or clearly documents the required setting.

Written by the indexing model from the issue text.