private com.google.protobuf.MapFieldBuilder<
              java.lang.String,
              com.google.cloud.vmwareengine.v1.NodeTypeConfigOrBuilder,
              com.google.cloud.vmwareengine.v1.NodeTypeConfig,
              com.google.cloud.vmwareengine.v1.NodeTypeConfig.Builder>
          internalGetNodeTypeConfigs() {
        if (nodeTypeConfigs_ == null) {
          return new com.google.protobuf.MapFieldBuilder<>(nodeTypeConfigsConverter);
        }
        return nodeTypeConfigs_;
      }
<pre>
Required. The user-provided identifier of the new `Cluster`.
The identifier must meet the following requirements:

* Only contains 1-63 alphanumeric characters and hyphens
* Begins with an alphabetical character
* Ends with a non-hyphen character
* Not formatted as a UUID
* Complies with [RFC
1034](https://datatracker.ietf.org/doc/html/rfc1034) (section 3.5)
</pre>

<code>string cluster_id = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@param value The bytes for clusterId to set.
@return This builder for chaining.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/PrivateCloud.java