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

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