@Override
    public java.util.concurrent.Future<TestDNSAnswerResult> testDNSAnswerAsync(TestDNSAnswerRequest request) {

        return testDNSAnswerAsync(request, null);
    }
Simplified method form for invoking the ListTrafficPolicyInstances operation with an AsyncHandler.

@see #listTrafficPolicyInstancesAsync(ListTrafficPolicyInstancesRequest, com.amazonaws.handlers.AsyncHandler)
aws-java-sdk-route53/src/main/java/com/amazonaws/services/route53/AbstractAmazonRoute53Async.java