public void setHostResourceGroupArn(String hostResourceGroupArn) {
        this.hostResourceGroupArn = hostResourceGroupArn;
    }
<p>
The ARN of the host resource group in which to launch the instances.
</p>

@param hostResourceGroupArn
       The ARN of the host resource group in which to launch the instances.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/LaunchTemplatePlacement.java