public String getCertificateAuthorityArn() {
        return this.certificateAuthorityArn;
    }
<p>
The Amazon Resource Name (ARN) of the private certificate authority (CA) that will be used to issue the
certificate. If you do not provide an ARN and you are trying to request a private certificate, ACM will attempt
to issue a public certificate. For more information about private CAs, see the <a
href="https://docs.aws.amazon.com/privateca/latest/userguide/PcaWelcome.html">Amazon Web Services Private
Certificate Authority</a> user guide. The ARN must have the following form:
</p>
<p>
<code>arn:aws:acm-pca:region:account:certificate-authority/12345678-1234-1234-1234-123456789012</code>
</p>

@return The Amazon Resource Name (ARN) of the private certificate authority (CA) that will be used to issue the
        certificate. If you do not provide an ARN and you are trying to request a private certificate, ACM will
        attempt to issue a public certificate. For more information about private CAs, see the <a
        href="https://docs.aws.amazon.com/privateca/latest/userguide/PcaWelcome.html">Amazon Web Services Private
        Certificate Authority</a> user guide. The ARN must have the following form: </p>
        <p>
        <code>arn:aws:acm-pca:region:account:certificate-authority/12345678-1234-1234-1234-123456789012</code>
aws-java-sdk-acm/src/main/java/com/amazonaws/services/certificatemanager/model/RequestCertificateRequest.java