如何使用Java API在Google Dataproc Cluster上设置可选属性？

import com.google.api.services.dataproc.DataprocScopes;
import com.google.api.services.dataproc.model.Cluster;
import com.google.api.services.dataproc.model.SoftwareConfig;
import com.google.api.services.dataproc.model.ClusterConfig;
import com.google.api.services.dataproc.model.NodeInitializationAction;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.dataproc.v1.*;
import com.google.protobuf.Empty;

import java.io.IOException;
import java.util.Arrays;

GoogleCredentials credentials = ServiceAccountCredentials.fromStream(credentialsStream)
        .createScoped(Arrays.asList(DataprocScopes.CLOUD_PLATFORM));

DataprocClusterManagerSettings settings =
        DataprocClusterManagerSettings.newBuilder()
                .setEndpoint(endpoint)
                .setCredentialsProvider(FixedCredentialsProvider.create(credentials))
                .build();
DataprocClusterManagerClient client = DataprocClusterManagerClient.create(settings);

Map<String, String> optionalClusterProperties = new HashMap<>();
optionalClusterProperties.put("property_name1", "property_value1");
optionalClusterProperties.put("property_name2", "property_value2");
// 添加其他可选属性

ClusterConfig clusterConfig = ClusterConfig.newBuilder()
        .setGceClusterConfig(gceClusterConfig)
        .setMasterConfig(instanceGroupConfig)
        .setWorkerConfig(instanceGroupConfig)
        .setSecondaryWorkerConfig(instanceGroupConfig)
        .setSoftwareConfig(softwareConfig)
        .putAllConfig(optionalClusterProperties)
        .build();

Cluster cluster = Cluster.newBuilder()
        .setClusterName(clusterName)
        .setConfig(clusterConfig)
        .build();

CreateClusterRequest request = CreateClusterRequest.newBuilder()
        .setProjectId(projectId)
        .setRegion(region)
        .setCluster(cluster)
        .build();
OperationFuture<Cluster, ClusterOperationMetadata> createClusterAsyncRequest =
        client.createClusterAsync(request);
createClusterAsyncRequest.get();