8 files declare their use of CartProviderInterface in Commerce Core 8.2

AddToCartForm.php in modules/cart/src/Form/AddToCartForm.php

CartBlock.php in modules/cart/src/Plugin/Block/CartBlock.php

CartCacheContext.php in modules/cart/src/Cache/Context/CartCacheContext.php

CartCacheContextTest.php in modules/cart/tests/src/Unit/CartCacheContextTest.php

CartController.php in modules/cart/src/Controller/CartController.php

CheckoutController.php in modules/checkout/src/Controller/CheckoutController.php

OrderEventSubscriber.php in modules/cart/src/EventSubscriber/OrderEventSubscriber.php

QueryAccessSubscriber.php in modules/cart/src/EventSubscriber/QueryAccessSubscriber.php