Optionalfencing_Optional fencing token to enforce (remains static across batches)
OptionallingerDuration in milliseconds to wait before flushing a batch (default: 5ms)
Optionalmatch_Optional sequence number to match for first batch (auto-increments for subsequent batches)
OptionalmaxMaximum batch size in metered bytes (default: 1 MiB, max: 1 MiB)
OptionalmaxMaximum number of records in a batch (default: 1000, max: 1000)
Types used with BatchTransform.