IEnumator Foo() {
    yield return null;
}

CoroutineExecutor.Do(Foo());

var group = new GroupCoroutine(Foo());
group.Add(Foo());
CoroutineExecutor.Do(group);

var order = new OrderCoroutine(Foo());
order.Add(Foo());
CoroutineExecutor.Do(order);

// It will wait until receiving event
var ev = new EventCoroutine(new string[] {"ABC", "123"});
yield return ev;

// After some coroutine wait for event,  You can send event by this way to trigger EventCoroutine to finish. 
CoroutineExeCcutor.SendEvent("ABC");

// Then every EventCoroutine wait for "ABC" event will be finish.

yield return BaseCoroutine.WaitFor.FixedUpdate;
or yield return new WaitForFixedUpdate();

yield return BaseCoroutine.WaitFor.EndOfFrame;
or yield return new WaitForEndOfFrame();