Probably because the downcasting happens for each page, so if there's a page without all the possible categories, the concat will fail. Could you file an issue to google-cloud-python with this for me?
/tmp/ipykernel_127420/829981878.py:1: FutureWarning: Downcasting object dtype arrays on .fillna, .ffill, .bfill is deprecated and will change in a future version ...
Discrete Event System Specification (DEVS) simulation libraries commonly make use of indirection and, essentially, typeless events as part of their interface specification. This forces library users ...
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