@Override
    public java.util.concurrent.Future<DescribeCommentsResult> describeCommentsAsync(DescribeCommentsRequest request) {

        return describeCommentsAsync(request, null);
    }
Returns the executor service used by this client to execute async requests.

@return The executor service used by this client to execute async requests.
aws-java-sdk-workdocs/src/main/java/com/amazonaws/services/workdocs/AmazonWorkDocsAsyncClient.java