public com.google.protobuf.ByteString getLanguageCodeBytes() {
        java.lang.Object ref = languageCode_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          languageCode_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
The BCP-47 language code, 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 = 1;</code>

@return The bytes for languageCode.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/TextAnnotation.java