public void setCertificateIdentifier(String certificateIdentifier) {
        this.certificateIdentifier = certificateIdentifier;
    }
<p>
The unique key that identifies a certificate.
</p>
<p>
Example: <code>rds-ca-2019</code>
</p>

@param certificateIdentifier
       The unique key that identifies a certificate.</p>
       <p>
       Example: <code>rds-ca-2019</code>
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/Certificate.java