public void setVersionName(String versionName) {
        this.versionName = versionName;
    }
<p>
The version of the rule group. You can only use a version that is not scheduled for expiration. If you don't
provide this, WAF uses the vendor's default version.
</p>

@param versionName
       The version of the rule group. You can only use a version that is not scheduled for expiration. If you
       don't provide this, WAF uses the vendor's default version.
aws-java-sdk-wafv2/src/main/java/com/amazonaws/services/wafv2/model/DescribeManagedRuleGroupRequest.java