private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vmwareengine.v1.ManagementDnsZoneBinding,
            com.google.cloud.vmwareengine.v1.ManagementDnsZoneBinding.Builder,
            com.google.cloud.vmwareengine.v1.ManagementDnsZoneBindingOrBuilder>
        getManagementDnsZoneBindingFieldBuilder() {
      if (managementDnsZoneBindingBuilder_ == null) {
        managementDnsZoneBindingBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vmwareengine.v1.ManagementDnsZoneBinding,
                com.google.cloud.vmwareengine.v1.ManagementDnsZoneBinding.Builder,
                com.google.cloud.vmwareengine.v1.ManagementDnsZoneBindingOrBuilder>(
                getManagementDnsZoneBinding(), getParentForChildren(), isClean());
        managementDnsZoneBinding_ = null;
      }
      return managementDnsZoneBindingBuilder_;
    }
<pre>
Required. The initial values for a new management DNS zone binding.
</pre>

<code>
.google.cloud.vmwareengine.v1.ManagementDnsZoneBinding management_dns_zone_binding = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/CreateManagementDnsZoneBindingRequest.java