10 files declare their use of PaymentLineItemInterface in Payment 8.2

LineItemCollection.php in src/LineItemCollection.php

LineItemCollectionInterface.php in src/LineItemCollectionInterface.php

LineItemCollectionTest.php in tests/src/Unit/LineItemCollectionTest.php

Payment.php in src/Entity/Payment.php

PaymentFactoryTest.php in modules/payment_reference/tests/src/Unit/PaymentFactoryTest.php

PaymentFormTest.php in modules/payment_form/tests/src/Unit/Plugin/Field/FieldFormatter/PaymentFormTest.php

PaymentLineItemsDisplayTest.php in tests/src/Unit/Element/PaymentLineItemsDisplayTest.php

PaymentLineItemsInput.php in src/Element/PaymentLineItemsInput.php

PaymentLineItemsInputTest.php in tests/src/Unit/Element/PaymentLineItemsInputTest.php

PaymentStorageWebTest.php in tests/src/Functional/Entity/Payment/PaymentStorageWebTest.php