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

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