public Set<String> processorConnectedStateStores(final String processorName) {
        for (final ProcessorNode<?, ?, ?, ?> node : processorNodes) {
            if (node.name().equals(processorName)) {
                return node.stateStores;
            }
        }

        return Collections.emptySet();
    }
Produces a string representation containing useful information this topology.
This is useful in debugging scenarios.
@return A string representation of this instance.
streams/src/main/java/org/apache/kafka/streams/processor/internals/ProcessorTopology.java