@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(label_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, label_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(languageCode_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, languageCode_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
The BCP-47 language code for `label`, such as "en-US" or "sr-Latn".
For more information, see
http://www.unicode.org/reports/tr35/#Unicode_locale_identifier.
</pre>

<code>string language_code = 2;</code>

@return The bytes for languageCode.
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/WebDetection.java