can broker reject orders under certain condition?

[Dillonhao]

I'd like to simulate the scenario in which order will be rejected under certain conditions, such as time etc.
I look through the doc and didn't find anything like subclass or functions. is it possible? thanks in advanced

[run-out]

From trade.py line 244 in update() method:

        if not size:
            return  # empty update, skip all other calculations

That should do it.