@Override
    public void shutdown() {
        throw new java.lang.UnsupportedOperationException();
    }
Abstract implementation of {@code AmazonPolly}. Convenient method forms pass through to the corresponding overload
that takes a request object, which throws an {@code UnsupportedOperationException}.
aws-java-sdk-polly/src/main/java/com/amazonaws/services/polly/AbstractAmazonPolly.java