Windows SDK 10.0.16299.0 defines these structures as part of winternl.h
but using different types and names. Unfortunately there's no macro to
detect the SDK version, so to avoid conflicting with newer / older SDKs
the OBS structs have been renamed.
The only way to open named kernel objects within a UWP "app" is to get
the AppContainer SID, and then open the objects with their full
system namespace names via undocumented NT functions.