docs: public void addCluster() {
      System.out.printf("%nAdding cluster: %s to instance: %s%n", CLUSTER, instanceId);
      // [START bigtable_create_cluster]
      try {
        adminClient.createCluster(
            CreateClusterRequest.of(instanceId, CLUSTER)
                .setZone("us-central1-c")
                .setServeNodes(3)
                .setStorageType(StorageType.SSD));
        System.out.printf("Cluster: %s created successfully%n", CLUSTER);
      } catch (AlreadyExistsException e) {
        System.err.println("Failed to add cluster, already exists: " + e.getMessage());
      }
      // [END bigtable_create_cluster]
    }