A quick web search for
javax.jws api removed or something similar. I think that the bit about the
java.se.ee ubermodule came from one of the java-centric tutorial-blog sites.
(The sort that are aimed at a junior/intermediate java programmer whose non-technical boss says “hey, our thingie is broke. Fix it by Monday”)
The article was aimed at short-term migrations from of Java 1.x code up to Java 9. The focus was getting your legacy code working right now, before you are prepared to do the proper re-structuring.
I’d give you a link, but its not in my browser history for some reason. Also, it was fairly shallow. (It was old enough that it did not have the Info that @Ali_RS added, about this only working on 9 & 10)
TL;DR version: I use iterative google-adjacent searches, spreading across multiple tabs, and often forget exactly where I found things!