Consolibyte QuickBooks PHP Library - Importing All Active Customers

I am looking at the directory of example files at https://github.com/consolibyte/quickbooks-php/tree/master/docs/web_connector for Consolibyte's QuickBooks PHP library and don't see an example that allows you to import a list of all customers in your QuickBooks instance.

Is there an example for this? If not, what would the XML look like? I am looking to import all active customers in my QB installation; every customer that I see here:

I found the example functions in the example_web_connector_import.php file under /docs/web_connector. The specific methods were _quickbooks_customer_import_request() and _quickbooks_customer_import_response()