public String getCluster() {
        return this.cluster;
    }
<p>
The short name or full Amazon Resource Name (ARN) of the cluster that your container instance is running on. If
you do not specify a cluster, the default cluster is assumed.
</p>

@return The short name or full Amazon Resource Name (ARN) of the cluster that your container instance is running
        on. If you do not specify a cluster, the default cluster is assumed.
aws-java-sdk-ecs/src/main/java/com/amazonaws/services/ecs/model/UpdateContainerAgentRequest.java