泛型和alias联合使用的问题

### Issue Description


### Additional Notes

使用泛型返回alias类型似乎没有办法正确的返回类型, 我希望在new中传入类名创建对象,并且强制调用init才能返回对象,不过没有找到正确的注释办法

No source file or test is named; start by reproducing the generic-and-alias type result described in the issue and tracing the language server's handling of the `new` call and `init`. Done means the annotation expresses the intended class-name construction and the returned object type is inferred correctly.

Written by the indexing model from the issue text.