gtk:tree-view-set-drag-dest-row (view path pos)

view -- a gtk:tree-view widget
path -- a gtk:tree-path instance of the row to highlight, or nil
pos -- a gtk:tree-view-drop-position value wich specifies whether to drop before, after or into the row

Sets the row that is highlighted for feedback. If path is nil, an existing highlight is removed. The gtk:tree-view implementation is deprecated since 4.10. Please do not use it in newly written code.