I've been struggling to find examples to implement custom unwind segues that would work with Xcode 10 and Swift 3. I thought looking into the source code would give me a clue.
Unfortunately, I don't even know where to find it (searched my macbook and googling)! Where could I find this file?
EDIT
Solved, see comment & answer below, UIStoryboardSeague.swift is part of UIKit and it is not open source.
The
UIStoryboardSegue
is part ofUIKit
.UIKit
is not open source.