8 files declare their use of Subscription in Acquia Connector 3.x

AcquiaConnectorModuleTest.php in tests/src/Functional/AcquiaConnectorModuleTest.php

acquia_connector.install in ./acquia_connector.install

Install, update, and uninstall functions for the Acquia Connector module.

acquia_connector.module in ./acquia_connector.module

Acquia Connector module.

AutoConnectorTest.php in tests/src/Unit/AutoConnectorTest.php

CredentialForm.php in src/Form/CredentialForm.php

InitSubscriber.php in src/EventSubscriber/InitSubscriber.php

SetupForm.php in src/Form/SetupForm.php

StatusController.php in src/Controller/StatusController.php