I apologize.
I had to:
- Find out what you were talking about
- Find out where it is documented
- Make sure that is no longer a feature
EDIT:
In 2010 coordinated access to a channel was important because many devices only did b/g and there was limited channel space. Today there is 5ghz 802.11ac with many more channels and much improved performance, so that feature is not needed like it was in 2010.