A minimal test case of the namespace issues with Down, extracted from a real project (which will be open, but isn't yet, until I get to a certain level of stability with it)
ISSUE LINK: johnxnguyen/Down#242
The issues are shown in HtmlVisitor.swift - in this stripped-down example, it's a simple edit to the Down package's own DebugVisitor.swift
From the command line:
$ swift package generate-xcodeproj && open SongsToTheSiren.xcodeproj/
OR
$ swift run
The former example will load/compile in Xcode, and probably gives the easiest way to see the alleged issue.