In iOS/Xcode projects it's common to use docstrings with Markdown for documenting methods, properties, protocols etc. within one source file.
However, I couldn't find any proper way for documenting a "folder" of files. E.g. I have sorted my app's functionality in different folders ("Xcode groups") and would like to attach some documentation on that level. For example that one folder is responsible for Network authentication, which is represented by more than just one source file.
How can that be achieved in such a way that we can always regenerate the current documentation with a tool such as Jazzy?