void vik_treeview_item_set_pointer ( VikTreeview *vt, GtkTreeIter *iter, gpointer pointer );
gpointer vik_treeview_item_get_parent ( VikTreeview *vt, GtkTreeIter *iter );
void vik_treeview_item_set_pointer ( VikTreeview *vt, GtkTreeIter *iter, gpointer pointer );
gpointer vik_treeview_item_get_parent ( VikTreeview *vt, GtkTreeIter *iter );