Hey,
I have talked to the developers of the integration and it looks like that is line is something that was left in and is not used by the plugin at all.
The suggested work around would be using something like
$this->get_api_response($url, wp_remote_request($url, $options));
I know this is not ideal.
What you could do as well is make your own integration and then make your own patch request. I hope this help but please let me know if you have any further questions.
