void addSubscribedTopicsFromMetadata(final Set<String> topics, final String logPrefix) {
        applyToEachBuilder(b -> b.addSubscribedTopicsFromMetadata(topics, logPrefix));
    }
@return    map from topology to its subtopologies and their topics info
streams/src/main/java/org/apache/kafka/streams/processor/internals/TopologyMetadata.java