10 files declare their use of DeliveryCandidate in Message Subscribe 8

DeliveryCandidateTest.php in tests/src/Unit/Subscribers/DeliveryCandidateTest.php

fixture_foo.module.php in tests/src/fixture_foo.module.php

Test hook implementation fixture.

MessageSubscribeEmailNotificationsTest.php in message_subscribe_email/tests/src/Kernel/MessageSubscribeEmailNotificationsTest.php

MessageSubscribeEmailSubscribersTest.php in message_subscribe_email/tests/src/Kernel/MessageSubscribeEmailSubscribersTest.php

message_subscribe.api.php in ./message_subscribe.api.php

Hooks provided by the Message subscribe module.

message_subscribe.module in ./message_subscribe.module

Subscribe API for the Message and Message notify modules.

message_subscribe_example.module in message_subscribe_example/message_subscribe_example.module

Holds hook implementation for the Message Subscribe Example module.

message_subscribe_test.module in tests/modules/message_subscribe_test/message_subscribe_test.module

Test implementations of message_subscribe hooks.

QueueTest.php in tests/src/Kernel/QueueTest.php

SubscribersTest.php in tests/src/Kernel/SubscribersTest.php