Hello! Say I have Event1, Event2, Event3 and BuyEv...
# questions
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Hello! Say I have Event1, Event2, Event3 and BuyEvent. The user could do BuyEvent at any time, but can only trigger Event1, Event2 and Event3 in order. Also, the user could do Event1, Event2, Event1, BuyEvent. In this case, i want to know he reached Event2. How could I find out which event reached before BuyEvent?