@Override
    public DiscoverPollEndpointResult discoverPollEndpoint() {
        return discoverPollEndpoint(new DiscoverPollEndpointRequest());
    }
Abstract implementation of {@code AmazonECS}. Convenient method forms pass through to the corresponding overload that
takes a request object, which throws an {@code UnsupportedOperationException}.
aws-java-sdk-ecs/src/main/java/com/amazonaws/services/ecs/AbstractAmazonECS.java