includes/lib/stripe-php/lib/Service/SubscriptionItemService.php

Method: Creates a usage record for a specified subscription item and date, and fills it with a quantity.

Method: Deletes an item from the subscription. Removing a subscription item from a subscription will not cancel the subscription.

Method: Retrieves the subscription item with the given ID.

Method: Updates the plan or quantity of an item on a current subscription.

Method: For the specified subscription item, returns a list of summary objects. Each object in the list provides usage information that’s been summarized from multiple usage records and over a subscription billing period (e.g., 15 usage records in the month of September).

Method: Adds a new item to an existing subscription. No existing items will be changed or replaced.

Method: Returns a list of your subscription items for a given subscription.