int unit_clean(Unit *u, ExecCleanMask mask);
int unit_can_clean(Unit *u, ExecCleanMask *ret_mask);
+bool unit_can_start_refuse_manual(Unit *u);
+bool unit_can_stop_refuse_manual(Unit *u);
+bool unit_can_isolate_refuse_manual(Unit *u);
+
bool unit_can_freeze(Unit *u);
int unit_freeze(Unit *u);
void unit_frozen(Unit *u);