public com.google.protobuf.ByteString getHostnameBytes() {
      java.lang.Object ref = hostname_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        hostname_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Required. Fully-qualified domain name (FQDN) or IP Address of the logging
server.
</pre>

<code>string hostname = 5 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for hostname.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/LoggingServer.java