public String getDBInstanceIdentifier() {
        return this.dBInstanceIdentifier;
    }
<p>
Contains a user-supplied database identifier. This identifier is the unique key that identifies a DB instance.
</p>

@return Contains a user-supplied database identifier. This identifier is the unique key that identifies a DB
        instance.
aws-java-sdk-securityhub/src/main/java/com/amazonaws/services/securityhub/model/AwsRdsDbInstanceDetails.java