[NTG-context] Define `\luatexversion` similar to `\contextversion`

Dear ConTeXt folks, thanks to Robin’s example documents I found out about the following last two commands \Context\ \contextmark\ \contextversion allowing to put the used components and versions into the document. Then I found `\luaversion` to display the version of Lua. But I could not find `\luatexversion`. Is there something similar? Can this command be defined? Thanks, Paul