@Override
    protected AmazonSNSAsync build(AwsAsyncClientParams params) {
        return new AmazonSNSAsyncClient(params);
    }
Construct an asynchronous implementation of AmazonSNSAsync using the current builder configuration.

@param params
       Current builder configuration represented as a parameter object.
@return Fully configured implementation of AmazonSNSAsync.
aws-java-sdk-sns/src/main/java/com/amazonaws/services/sns/AmazonSNSAsyncClientBuilder.java