Gtk.TreeView.prototype.set_drag_dest_row

function set_drag_dest_row(path:Gtk.TreePath, pos:Gtk.TreeViewDropPosition):void {
    // Gjs wrapper for gtk_tree_view_set_drag_dest_row()
}

Sets the row that is highlighted for feedback. If path is null, an existing highlight is removed.

path

The path of the row to highlight, or null

pos

Specifies whether to drop before, after or into the row