Question about using public classes from the internal packages

Hi all,

I have a question about using classes that are are public but the class is
contained in the internals packages Generally, would it be supported if I
wrote Kafka code referencing these classes?

This question comes from an attempt to add a CacheListener to a
TimestampedKeyValueStore. The line of code looks like this:

cachingEnabled = ((WrappedStateStore) this.store).setFlushListener(new
AggregateCacheFlushListener<>(context), false);

To gain access to the setFlushListener the code needs to cast the
underlying state store object to a
org.apache.kafka.streams.state.internals.WrappedStateStore object.

Kind regards,
John Brackin