Programmatically add invoice

Hello,

Thank you for this plugin.

I was wondering if it is possible to add an invoice programmatically at this moment?

For example something like:

<?php
$invoice = flexible_invoices_add_invoice( array(
   'products' => array(
      'description' => '',
      'quantity' => '',
      'price' => '',
   ),
   'customer' => array(
      'id' => '', // optional
      'name' => '',
      'address' => ''
   )
) );

Thanks again and I look forward to your reply.