HI Pavel,
All new Checks that appear in Checkstyle were created due to GSoC activity, and we had to implement and seriously test them directly in checkstyle project.
There are NO other new Checks that come to main library during that year. I have a lot of requests for new Checks but rule is strict for all.
Your Check is not forgotten, I even have issue to it, that I still did not found time to formulate and put in public, I will do in next few weeks for sure.
Please do not propagate it to main library for now.
thanks,
Roman Ivanov