private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vmwareengine.v1.DnsForwarding,
            com.google.cloud.vmwareengine.v1.DnsForwarding.Builder,
            com.google.cloud.vmwareengine.v1.DnsForwardingOrBuilder>
        getDnsForwardingFieldBuilder() {
      if (dnsForwardingBuilder_ == null) {
        dnsForwardingBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vmwareengine.v1.DnsForwarding,
                com.google.cloud.vmwareengine.v1.DnsForwarding.Builder,
                com.google.cloud.vmwareengine.v1.DnsForwardingOrBuilder>(
                getDnsForwarding(), getParentForChildren(), isClean());
        dnsForwarding_ = null;
      }
      return dnsForwardingBuilder_;
    }
<pre>
Required. DnsForwarding config details.
</pre>

<code>
.google.cloud.vmwareengine.v1.DnsForwarding dns_forwarding = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/UpdateDnsForwardingRequest.java