# protocol_getProperty(_:_:_:_:) Returns the specified property of a given protocol. ``` func protocol_getProperty(_ proto: Protocol, _ name: UnsafePointer, _ isRequiredProperty: Bool, _ isInstanceProperty: Bool) -> objc_property_t? ``` ## Parameters `proto` A protocol. `name` The name of a property. `isRequiredProperty` A Boolean value that indicates whether `name` is a required property. `isInstanceProperty` A Boolean value that indicates whether `name` is an instance property. ## Return Value The property specified by `name`, `isRequiredProperty`, and `isInstanceProperty` for `proto`, or `NULL` if none of `proto`’s properties meets the specification. ## Discussion --- 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)