@java.lang.Override
    public int getProtocolValue() {
      return protocol_;
    }
<pre>
Required. Protocol used by vCenter to send logs to a logging server.
</pre>

<code>
.google.cloud.vmwareengine.v1.LoggingServer.Protocol protocol = 6 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The enum numeric value on the wire for protocol.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/LoggingServer.java