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

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