public String getCertificateAuthorityPublicKeyIdentifier() {
        return this.certificateAuthorityPublicKeyIdentifier;
    }
<p>
The <code>KeyARN</code> of the certificate chain that signs the signing key certificate during TR-34 key import.
</p>

@return The <code>KeyARN</code> of the certificate chain that signs the signing key certificate during TR-34 key
        import.
aws-java-sdk-paymentcryptography/src/main/java/com/amazonaws/services/paymentcryptography/model/ImportTr34KeyBlock.java