static Map<String, String> clusterConfigsWithPrefix(String prefix, Map<String, String> props) {
        return props.entrySet().stream()
                .filter(x -> !x.getKey().matches("(^consumer.*|^producer.*|^admin.*)"))
                .collect(Collectors.toMap(x -> prefix + x.getKey(), Entry::getValue));
    }
Construct a MirrorClientConfig from properties of the form cluster.x.y.z.
Use to connect to a cluster based on the MirrorMaker top-level config file.
connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorMakerConfig.java