def build_end_time(self):
        """Defaults the end_time to the current time in UTC unless a non `None` event_time_end was provided"""
        end_time = self.event_time_end or self.default_end_time
        return MicrobatchBuilder.ceiling_timestamp(end_time, self.model.config.batch_size)
Defaults the end_time to the current time in UTC unless a non `None` event_time_end was provided
core/dbt/materializations/incremental/microbatch.py