public void setThingGroupArn(String thingGroupArn) {
        this.thingGroupArn = thingGroupArn;
    }
<p>
The group ARN.
</p>

@param thingGroupArn
       The group ARN.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/RemoveThingFromThingGroupRequest.java