PartitionKeys in Metadata for KinesisAnalyticsInputPreprocessingResponse.Record missing

This is used for Dynamic Partitioning, seemingly required as per https://docs.aws.amazon.com/firehose/latest/dev/dynamic-partitioning-partitioning-keys.html

Locate KinesisAnalyticsInputPreprocessingResponse.Record in the Java interface definitions and compare its metadata with the AWS Dynamic Partitioning documentation linked in the issue. Confirm the expected PartitionKeys representation and verify that the metadata exposes it for dynamic partitioning.

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