`vtupress_service_registry`
Add or remove core services (Airtime, Data, etc.)
**Before:** Array containing `[‘airtime’ => ‘…’, ‘data’ => ‘…’]`
**Hook Example:**
```php
add_filter('vtupress_service_registry', function($registry) {
$registry['new_service'] = 'My_Custom_Service_Class';
unset($registry['cable']); // Optionally remove a service
return $registry;
});
```**After:** Array contains `[‘airtime’ => ‘…’, ‘data’ => ‘…’, ‘new_service’ => ‘My_Custom_Service_Class’]`