pub unsafe extern "C" fn gtk_tree_sortable_set_sort_func(
sortable: *mut GtkTreeSortable,
sort_column_id: c_int,
sort_func: GtkTreeIterCompareFunc,
user_data: gpointer,
destroy: GDestroyNotify,
)
pub unsafe extern "C" fn gtk_tree_sortable_set_sort_func(
sortable: *mut GtkTreeSortable,
sort_column_id: c_int,
sort_func: GtkTreeIterCompareFunc,
user_data: gpointer,
destroy: GDestroyNotify,
)