THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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When querying a TVList, the TimeRanges are sorted and merged before a TVList tries to access them. For example, we have [1,10], [5,12], [15,20], [16,21] in the original list, then they will be preprocessed to [1,12] and [15,21].For cases when where there are a large number of deletion operations, it would be helpful to exclude deleted data.
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