6 files declare their use of ContentHubSubscription in Acquia Content Hub 8

ContentEntityViewModesExtractor.php in src/Normalizer/ContentEntityViewModesExtractor.php

ContentHubAccess.php in src/Access/ContentHubAccess.php

ContentHubInternalRequestTest.php in tests/src/Unit/ContentHubInternalRequestTest.php

ContentHubSettingsForm.php in src/Form/ContentHubSettingsForm.php

ContentHubWebhookController.php in src/Controller/ContentHubWebhookController.php

WebhooksSettingsForm.php in src/Form/WebhooksSettingsForm.php