@com.amazonaws.annotation.SdkInternalApi
    static com.amazonaws.protocol.json.SdkJsonProtocolFactory getProtocolFactory() {
        return protocolFactory;
    }
Invoke the request using the http client. Assumes credentials (or lack thereof) have been configured in the
ExecutionContext beforehand.
aws-java-sdk-discovery/src/main/java/com/amazonaws/services/applicationdiscovery/AWSApplicationDiscoveryClient.java