StackViewBackgroundChecker is a tool of printing filepath when any backgroundColor specified for UIStackView in xib, storyboard.
$ git clone git@github.com:bannzai/StackViewBackgroundChecker.git
$ cd StackViewBackgroundChecker
$ swift build
$ .build/x86_64-apple-macosx/debug/StackViewBackgroundChecker {XIB_PATH} {STORYBOARD_PATH}
XIB_PATH has background color attributes for stackView. level is 9 MIT