public boolean hasLanguageCode() {
      return ((bitField0_ & 0x00000002) != 0);
    }
<pre>
The language code of the user.
</pre>

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

@return Whether the languageCode field is set.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/RetrievalConfig.java