public String getCertificateArn() {
        return this.certificateArn;
    }
<p>
The reference to an Amazon Web Services-managed certificate that will be used by edge-optimized endpoint for this
domain name. Certificate Manager is the only supported source.
</p>

@return The reference to an Amazon Web Services-managed certificate that will be used by edge-optimized endpoint
        for this domain name. Certificate Manager is the only supported source.
aws-java-sdk-api-gateway/src/main/java/com/amazonaws/services/apigateway/model/CreateDomainNameRequest.java