public void setVersionName(String versionName) {
        this.versionName = versionName;
    }
<p>
The managed rule group's version.
</p>

@param versionName
       The managed rule group's version.
aws-java-sdk-wafv2/src/main/java/com/amazonaws/services/wafv2/model/DescribeManagedRuleGroupResult.java