public static com.google.protobuf.Parser<DetectLanguageRequest> parser() {
    return PARSER;
  }
<pre>
Optional. The labels with user-defined metadata for the request.

Label keys and values can be no longer than 63 characters
(Unicode codepoints), can only contain lowercase letters, numeric
characters, underscores and dashes. International characters are allowed.
Label values are optional. Label keys must start with a letter.

See https://cloud.google.com/translate/docs/labels for more information.
</pre>

<code>map&lt;string, string&gt; labels = 6 [(.google.api.field_behavior) = OPTIONAL];</code>
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/DetectLanguageRequest.java