gtk-list-box-drag-highlight-row (listbox row)

listbox -- a gtk-list-box widget
row -- a gtk-list-box-row widget

This is a helper function for implementing drag and drop onto a list box. The passed in row will be highlighted via the gtk-drag-highlight function, and any previously highlighted row will be unhighlighted. The row will also be unhighlighted when the widget gets a drag leave event.