public Builder setLanguageCode(java.lang.String value) {
        if (value == null) {
          throw new NullPointerException();
        }
        languageCode_ = value;
        bitField0_ |= 0x00000001;
        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 = 1;</code>

@param value The languageCode to set.
@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/TextAnnotation.java