Functiontypes can not be set as "out" or "return" values.

but also do not trigger a generation error. In my opinion, nothing speaks against allowing and implementing this feature. Probably this is related to issue #104

首先审阅相关 issue #104，并追踪组件生成过程中验证函数类型的位置。该 issue 未指定任何文件或测试；要完成此项工作，需要达成一致的设计、成功将函数类型作为 out 或返回值处理，以及一个覆盖新行为的生成测试。

由索引模型根据 Issue 内容生成。