Will Drag & Relate objects be exposed in the SDK enhancements for 8.8?

I have a customer who has to turn off Drag & Relate because if you give a user access to the Sales / AR portion, even through they may not have access to AR Invoice, they can view all the invoice details through Drag & Relate. l have not been able to find a doucment that lists the SDK enhancements for SBO 8.8, but am hoping someone in this group may know if the individual Drag & Relate objects will be exposed in the SDK verses just the trunk of the tree as is today.

Thanks for your help.