[NTG-context] Can I use \starthangaround?

[peter.hopcroft at icloud.com]

\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