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

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