[NTG-context] Can I use \starthangaround?

\starthangaround is mentioned in these context garden wiki pages: https://wiki.contextgarden.net/CD_Booklet https://wiki.contextgarden.net/Unexpected_behavior When I try to use examples from these pages I get an error that \starthangaround is undefined. It isn’t in any of my context installation files, including cont-new.tex. I'm using LMTX, installed a few days ago. Is it possible for me to use \starthangaround ? Peter Hopcroft