I am building a rather large library and I think it would be a lot cleaner if I could have the implementation for my methods and such hidden. For example, when you view the in-code documentation for standard Swift types, such as `UInt64`, you see things like:[![enter image description here](https://i.stack.imgur.com/z1kC7.png)](https://i.stack.imgur.com/z1kC7.png)

With the actual implementation of the methods hidden, and only the declarations and headers shown. How can I do this with my own library?