public static AWSNetworkManagerAsyncClientBuilder asyncBuilder() {
        return AWSNetworkManagerAsyncClientBuilder.standard();
    }
Client for accessing NetworkManager 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>
Amazon Web Services enables you to centrally manage your Amazon Web Services Cloud WAN core network and your Transit
Gateway network across Amazon Web Services accounts, Regions, and on-premises locations.
</p>
aws-java-sdk-networkmanager/src/main/java/com/amazonaws/services/networkmanager/AWSNetworkManagerAsyncClient.java