def getSinceVersion(self):
        raise NotImplementedError
validate the event_start_time and event_end_time of a hackathon
dataset/ETHPy150Open rwl/muntjac/muntjac/demo/sampler/Feature.py/Feature.getSinceVersion--crossover with--dataset/ETHPy150Open msopentechcn/open-hackathon/open-hackathon-server/src/hackathon/expr/expr_mgr.py/ExprManager.__verify_hackathon