static void abort_job ( CommonJob * job ) {
 g_clear_object ( & job -> undo_info ) ;
 g_cancellable_cancel ( job -> cancellable ) ;
 }
static void abort_job ( CommonJob * job ) {
 g_clear_object ( & job -> undo_info ) ;
 g_cancellable_cancel ( job -> cancellable ) ;
 }