public java.lang.String getDomain() {
        java.lang.Object ref = domain_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          domain_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
<pre>
Required. Domain used to resolve a `name_servers` list.
</pre>

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

@return The domain.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/DnsForwarding.java