public Set<String> stateStoreNamesForSubtopology(final int subtopologyId) {
        return subtopologyIdToStateStoreNames.get(subtopologyId);
    }
@return names of all source topics, including the application id/named topology prefix for repartition sources
streams/src/main/java/org/apache/kafka/streams/processor/internals/InternalTopologyBuilder.java