public static AWSAppTestAsyncClientBuilder asyncBuilder() {
        return AWSAppTestAsyncClientBuilder.standard();
    }
Client for accessing AWS Mainframe Modernization Application Testing asynchronously. Each asynchronous method will
return a Java Future object representing the asynchronous operation; overloads which accept an {@code AsyncHandler}
can be used to receive notification when an asynchronous operation completes.
<p>
<p>
AWS Mainframe Modernization Application Testing provides tools and resources for automated functional equivalence
testing for your migration projects.
</p>
aws-java-sdk-apptest/src/main/java/com/amazonaws/services/apptest/AWSAppTestAsyncClient.java