public String getCACertificateIdentifier() {
        return this.cACertificateIdentifier;
    }
<p>
The CA certificate identifier to use for the DB instance's server certificate.
</p>
<p>
This setting doesn't apply to RDS Custom DB instances.
</p>
<p>
For more information, see <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.SSL.html">Using SSL/TLS to encrypt a
connection to a DB instance</a> in the <i>Amazon RDS User Guide</i> and <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/UsingWithRDS.SSL.html"> Using SSL/TLS to
encrypt a connection to a DB cluster</a> in the <i>Amazon Aurora User Guide</i>.
</p>

@return The CA certificate identifier to use for the DB instance's server certificate.</p>
        <p>
        This setting doesn't apply to RDS Custom DB instances.
        </p>
        <p>
        For more information, see <a
        href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.SSL.html">Using SSL/TLS to
        encrypt a connection to a DB instance</a> in the <i>Amazon RDS User Guide</i> and <a
        href="https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/UsingWithRDS.SSL.html"> Using SSL/TLS
        to encrypt a connection to a DB cluster</a> in the <i>Amazon Aurora User Guide</i>.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/RestoreDBInstanceFromDBSnapshotRequest.java