Example of KCL working with MultiStreamTracker

Hi, Im trying to update my current KCL 2.4 application to work with multiple streams using the MultiStreamTracker setup. The intial app was created using the tutorial as a base https://docs.aws.amazon.com/streams/latest/dev/tutorial-stock-data-kplkcl2.html but cannot find any examples of a working MultiStreamTracker implementation.

Have read through the docs here https://docs.aws.amazon.com/streams/latest/dev/shared-throughput-kcl-consumers.html but still TBH confused as to where to start ( Am not an advanced java coder :( )

Any help would be apreciated