In response to requests for more clarity. Navigate to your Xcode beta and pop down to Contents/Developer/Platforms. From there go down into any of the Mac platforms, e.g. MacOSX.platform and then to Developer/SDKs and into another platform, e.g. MacOSX10.11.sdk. Next enter System/Library/PrivateFrameworks/Swift.
As I continue to work on playground book prep, I decided I couldn’t live without perfectly rendered playground value history and XPC live view caps. Instead of using a screenshot-trim approach, I figured I could render views directly to disk.
Last night, I wrote my first ever Xcode plug-in. It’s a very odd place to explore and one I wasn’t planning for when I woke up yesterday.