@java.lang.Override
  public com.google.protobuf.ByteString getContentLanguageBytes() {
    java.lang.Object ref = contentLanguage_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      contentLanguage_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
Optional. Updates objects Content-Language fixed metadata. Refer to ISO
639-1 language codes for typical values of this metadata. Max length 100
characters. Unset values will be ignored. Set empty values to clear the
metadata. Refer to documentation in
https://cloud.google.com/storage/docs/metadata#content-language.
</pre>

<code>optional string content_language = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for contentLanguage.
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/PutMetadata.java