public void setCreationTime(String creationTime) {
        this.creationTime = creationTime;
    }
<p>
The date and time that the rule group was created, in Unix time format and Coordinated Universal Time (UTC).
</p>

@param creationTime
       The date and time that the rule group was created, in Unix time format and Coordinated Universal Time
       (UTC).
aws-java-sdk-route53resolver/src/main/java/com/amazonaws/services/route53resolver/model/FirewallRuleGroup.java