27cff396ad
Summary: I'm working on an attribute inspector that has particular top-level special keys that should not be editable, while the rest can be. This enables the functionality to allow dynamic determinations of what can be made editable, and is an additive non-breaking change to the API. Reviewed By: mweststrate Differential Revision: D22111965 fbshipit-source-id: 4bc6df0f76cf1e2bf0590235dcf543c665c7d8d8