@Override
    public java.util.concurrent.Future<SendSerialConsoleSSHPublicKeyResult> sendSerialConsoleSSHPublicKeyAsync(SendSerialConsoleSSHPublicKeyRequest request) {

        return sendSerialConsoleSSHPublicKeyAsync(request, null);
    }
Abstract implementation of {@code AWSEC2InstanceConnectAsync}. Convenient method forms pass through to the
corresponding overload that takes a request object and an {@code AsyncHandler}, which throws an
{@code UnsupportedOperationException}.
aws-java-sdk-ec2instanceconnect/src/main/java/com/amazonaws/services/ec2instanceconnect/AbstractAWSEC2InstanceConnectAsync.java