How can I get a ray cast result normal?

[captainkidd5]

Looking here I'm trying to cast a ray at the ground and see if the normal returned is close to Vector3.Up. The RayCastResult spits out a body ID, but I'm not sure exactly how to get the

Body::GetWorldSpaceSurfaceNormal(collected sub shape ID, inRay.GetPointOnRay(collected fraction)) on body with collected body ID

without actually having a Body object (only the id)
Perhaps this would need to be implemented on BodyInterface?