public ClusterConfig build() {
            return new ClusterConfig(types, brokers, controllers, disksPerBroker, autoStart, securityProtocol, listenerName,
                    trustStoreFile, metadataVersion, serverProperties, producerProperties, consumerProperties,
                    adminClientProperties, saslServerProperties, saslClientProperties,
                    perServerProperties, tags, features);
        }
Represents an immutable requested configuration of a Kafka cluster for integration testing.
core/src/test/java/kafka/test/ClusterConfig.java