After upgrading to CGEcommerceBase-1.8.6 (or in fact any version after
CGEcommerceBase-1.7), trying to load 'Calguys Ecommerce Base' in the E-commerce
tab results in the following error.  The error is also encountered when using
"Submit" after changing settings in the Stripe Payment Gateway' module.

Fatal error: Class StripeGateway\gateway contains 1 abstract method and must
therefore be declared abstract or implement the remaining methods
(CGEcommerceBase\payment_gateway::GetName) in
/home/xxxxx/yyyyyy/cms/modules/StripeGateway/lib/class.gateway.php on line 215

The CGEcommerceBase-1.7 upgrade added 
  
  public function GetName();

to the 'payment_gateway' interface defined in interface.payment_gateway.php
(line 58), which results in the error above, since it is missing in the
'StripeGateway\lib\class.gateway.php' file.

NOTE:  I also downloaded and installed AuthNetAim to see if it had GetName
defined, but it too incurred the same error.  Presumably any gateway that hasn't
been updated since CGEcommerceBase-1.7 will fail too.


WORKAROUND:

I added the following to 'StripeGateway\lib\class.gateway.php' :

    public function GetName()
    {
        $mod = \cms_utils::get_module(MOD_STRIPEGATEWAY);
        return $mod->GetName() ;
    }

and that seemed to fix the problem (although I'm unclear on whether that is the
name being sought...)