public Builder setLanguageCode(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      languageCode_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<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 = 2;</code>

@param value The languageCode to set.
@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/LocalizedObjectAnnotation.java