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

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