# subscript(dynamicMember:) Facilitates accessing subscription properties on an option value. ``` subscript(dynamicMember keyPath: KeyPath) -> T? { get } ``` ## Discussion You don’t use this subscript directly. Instead, access the properties of [`Product.SubscriptionInfo`](/documentation/StoreKit/Product/SubscriptionInfo) directly on a [`SubscriptionStoreControlStyleConfiguration.Option`](/documentation/StoreKit/SubscriptionStoreControlStyleConfiguration/Option) value. For an example of using a dynamic member lookup, see [`SubscriptionStoreControlStyleConfiguration.Option`](/documentation/StoreKit/SubscriptionStoreControlStyleConfiguration/Option). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)