public String topologyDescriptionString() {
        if (isEmpty()) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();

        applyToEachBuilder(b -> sb.append(b.describe().toString()));

        return sb.toString();
    }
@return true iff any of the topologies have no local (aka non-global) topology
streams/src/main/java/org/apache/kafka/streams/processor/internals/TopologyMetadata.java