public synchronized List<String> fullSourceTopicNames() {
        if (fullSourceTopicNames == null) {
            fullSourceTopicNames = maybeDecorateInternalSourceTopics(rawSourceTopicNames);
            Collections.sort(fullSourceTopicNames);
        }
        return fullSourceTopicNames;
    }
@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