I would like to use a master-detail grid view for my DevExpress grid, but still use a BO or a BusinessBindingSource for the DataSource.  How do I setup the Master/Detail relationship in the BO so that it works in the grid correctly?  It has to know somehow which fields to use in the master view and which in the detail.

The way that they show it working is that you set some kind of ChildRelations property on the DataTable that you are setting as the DataSource for the grid.  This determines which columns are treated as master and which as detail on the DevExpress side.  I'm having some trouble finding any kind of ChildRelations collection on the BO.