public void setEngineVersion(String engineVersion) {
        this.engineVersion = engineVersion;
    }
<p>
The custom engine version (CEV) that you want to modify. This option is required for RDS Custom for Oracle, but
optional for Amazon RDS. The combination of <code>Engine</code> and <code>EngineVersion</code> is unique per
customer per Amazon Web Services Region.
</p>

@param engineVersion
       The custom engine version (CEV) that you want to modify. This option is required for RDS Custom for
       Oracle, but optional for Amazon RDS. The combination of <code>Engine</code> and <code>EngineVersion</code>
       is unique per customer per Amazon Web Services Region.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/ModifyCustomDBEngineVersionRequest.java