Need more test cases, samples, documentation for StreamConfigs in case of Multi Streams with KCL2.x.

[siddharthjain210]

I have been trying to implement KCL2,x for Multi Streams as per the documentation.,
https://docs.aws.amazon.com/streams/latest/dev/shared-throughput-kcl-consumers.html#shared-throughput-kcl-consumers-leasetable-sync-new-kcl2

This is not clear on how to provide the consumerArn in the StreamConfig class. need more sample and how the value can be derived or build.

Also there is very little information around the significance of streamCreationEpoch while implementing MultiStreamTracker Interface.