/**
  * Get the instance for all the included classes.
  * Overrides SP Lite init().
  */
 public function init()
 {
     Stripe_Checkout_Scripts::get_instance();
     Stripe_Checkout_Shortcodes::get_instance();
     if (is_admin()) {
         Stripe_Checkout_Admin::get_instance();
         Stripe_Checkout_Pro_Admin::get_instance();
         Stripe_Checkout_Pro_Licenses::get_instance();
         Stripe_Checkout_Notices::get_instance();
         Stripe_Checkout_System_Status::get_instance();
     } else {
         Stripe_Checkout_Misc::get_instance();
     }
     // Need to leave outside of is_admin check or the AJAX will not work properly
     Stripe_Checkout_Pro_Functions::get_instance();
 }