12 files declare their use of SmsGateway in SMS Framework 8

RouteSubscriber.php in src/Routing/RouteSubscriber.php

SmsDevelMessageForm.php in modules/sms_devel/src/Form/SmsDevelMessageForm.php

SmsFrameworkGatewayAdminTest.php in tests/src/Functional/SmsFrameworkGatewayAdminTest.php

SmsFrameworkGatewayEntityTest.php in tests/src/Kernel/SmsFrameworkGatewayEntityTest.php

SmsFrameworkProviderTest.php in tests/src/Kernel/SmsFrameworkProviderTest.php

SmsFrameworkSmsSendTest.php in tests/src/Kernel/SmsFrameworkSmsSendTest.php

SmsFrameworkTestTrait.php in tests/src/Functional/SmsFrameworkTestTrait.php

SmsGatewayForm.php in src/Form/SmsGatewayForm.php

SmsMessageProcessor.php in src/EventSubscriber/SmsMessageProcessor.php

SmsRouteEnhancer.php in src/Routing/Enhancer/SmsRouteEnhancer.php

SmsSettingsForm.php in src/Form/SmsSettingsForm.php

SmsTestEventSubscriber.php in tests/modules/sms_test/src/EventSubscriber/SmsTestEventSubscriber.php