public void setGroupName(String groupName) {
        this.groupName = groupName;
    }
<p>
The name of the placement group for the Kubernetes control plane instances. This setting can't be changed after
cluster creation.
</p>

@param groupName
       The name of the placement group for the Kubernetes control plane instances. This setting can't be changed
       after cluster creation.
aws-java-sdk-eks/src/main/java/com/amazonaws/services/eks/model/ControlPlanePlacementRequest.java