10 files declare their use of StockTransactionsInterface in Commerce Stock 8

EnforcementBrowserTest.php in modules/enforcement/tests/src/Functional/EnforcementBrowserTest.php

LocalStockUpdaterTest.php in modules/local_storage/tests/src/Kernel/LocalStockUpdaterTest.php

OrderEventsTransactionsTest.php in modules/local_storage/tests/src/Kernel/OrderEventsTransactionsTest.php

OrderEventSubscriber.php in src/EventSubscriber/OrderEventSubscriber.php

OrderEventTransactionsKernelTest.php in modules/local_storage/tests/src/Kernel/OrderEventTransactionsKernelTest.php

OutOfStockTest.php in modules/enforcement/tests/src/Functional/OutOfStockTest.php

StockLevel.php in modules/field/src/Plugin/Field/FieldType/StockLevel.php

StockLevelFieldTestBase.php in modules/field/tests/src/Functional/StockLevelFieldTestBase.php

StockLevelFormatterTest.php in modules/field/tests/src/Functional/StockLevelFormatterTest.php

StockLevelTest.php in modules/field/tests/src/Kernel/StockLevelTest.php