public com.google.protobuf.ByteString getCloudfrontDomainBytes() {
        java.lang.Object ref = cloudfrontDomain_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          cloudfrontDomain_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<pre>
Optional. The CloudFront distribution domain name pointing to this bucket,
to use when fetching.

See
[Transfer from S3 via
CloudFront](https://cloud.google.com/storage-transfer/docs/s3-cloudfront)
for more information.

Format: `https://{id}.cloudfront.net` or any valid custom domain. Must
begin with `https://`.
</pre>

<code>string cloudfront_domain = 6 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for cloudfrontDomain.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java