7 files declare their use of PaymentGatewayException in Commerce Core 8.2

PaymentCheckoutController.php in modules/payment/src/Controller/PaymentCheckoutController.php

PaymentGatewayForm.php in modules/payment/src/Plugin/Commerce/InlineForm/PaymentGatewayForm.php

PaymentMethodAddForm.php in modules/payment/src/PluginForm/PaymentMethodAddForm.php

PaymentMethodDeleteForm.php in modules/payment/src/Form/PaymentMethodDeleteForm.php

PaymentMethodEditForm.php in modules/payment/src/PluginForm/PaymentMethodEditForm.php

PaymentOffsiteForm.php in modules/payment_example/src/PluginForm/OffsiteRedirect/PaymentOffsiteForm.php

PaymentProcess.php in modules/payment/src/Plugin/Commerce/CheckoutPane/PaymentProcess.php