New Post: How to get Master/Detail view with the Toolkit's DataGridControl

It appears that there's some sort of Master/Detail capability in the Toolkit's DataGridControl but I can't seem to figure out how to get it to work and I've not been able to find any useful documentation on this. The docs I can find are for the newer standalone (paid) control and they don't seem to apply to the older control with the Toolkit.

Are there any examples on how to do a Master/Detail view with the Toolkit's version of DataGridControl? I've tried playing around with DefaultDetailsConfiguration but rows never seem to be expandable.