7 classes are annotated with SmsGateway in SMS Framework 2.x

DefaultCapabilities in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/DefaultCapabilities.php

A gateway for testing undefined capability annotation values.

Incoming in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/Incoming.php

Defines a gateway supporting incoming route.

Memory in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/Memory.php

Defines a gateway storing transmitted SMS in memory.

MemoryChunked in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/MemoryChunked.php

Defines a gateway requiring chunked messages.

MemoryOutgoingResult in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/MemoryOutgoingResult.php

Defines a gateway with defective return values for its' send method.

NoIncoming in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/NoIncoming.php

Defines a gateway which does not implement incoming messages.

ScheduleAware in tests/modules/sms_test_gateway/src/Plugin/SmsGateway/ScheduleAware.php

Defines a gateway which is aware of scheduled send time.