Whilst reviewing PR#3396, I discovered that javalibString appears to be missing two staticjoin methods.

TheStringJoiner class in PR#3396 may be useful to implement the missing methods.

Scala Native does not have some String methods, such as, I believe,intern because they are hard to
implement or of low value. It looks like it is time to inventory theString methods to see what is
missing and why. I personally like the style of leaving an unimplemented methods as
// def intern(): Mumble // Unimplented, too hard. Some folks frown on that style. I find
it useful to find such a "broken heart" rather than a stunning & hard to find absence.
Shows that someone at least considered the issue.