SalesChannelContextPermissionsChangedEvent example

$payment,
            $base->getShippingMethod(),
            $shippingLocation,
            $customer,
            $itemRounding,
            $totalRounding
        );

        if (\array_key_exists(SalesChannelContextService::PERMISSIONS, $options)) {
            $salesChannelContext->setPermissions($options[SalesChannelContextService::PERMISSIONS]);

            $event = new SalesChannelContextPermissionsChangedEvent($salesChannelContext, $options[SalesChannelContextService::PERMISSIONS]);
            $this->eventDispatcher->dispatch($event);

            $salesChannelContext->lockPermissions();
        }

        $salesChannelContext->setTaxState($this->taxDetector->getTaxState($salesChannelContext));

        return $salesChannelContext;
    }

    private function getTaxRules(BaseContext $context, ?CustomerEntity $customer, ShippingLocation $shippingLocation): TaxCollection
    {