7 files declare their use of BillingSchedule in Commerce Recurring Framework 8

BillingScheduleForm.php in src/Form/BillingScheduleForm.php

BillingScheduleTest.php in tests/src/FunctionalJavascript/BillingScheduleTest.php

BillingScheduleTest.php in tests/src/Kernel/Entity/BillingScheduleTest.php

InitialOrderProcessorTest.php in tests/src/Kernel/InitialOrderProcessorTest.php

ProductVariationTest.php in tests/src/Kernel/Plugin/Commerce/SubscriptionType/ProductVariationTest.php

RecurringKernelTestBase.php in tests/src/Kernel/RecurringKernelTestBase.php

SubscriptionTest.php in tests/src/Functional/SubscriptionTest.php