In a parent/detail Grid scenario, on expanding a parent row, if the detail row has larger content that needs to be scrolled vertically, it would be helpful to have the option to make the expanded parent row sticky. This way the row won't go out of view and the user would be able to collapse the row without having to scroll up. Sticking the row could potentially be limited to work only with the last expanded row, to avoid having more than one sticky parent rows at the same time.