Question Unity.Physics.TerrainCollider: Passing Hole Information

I am creating a TerrainCollider in Unity Physics 0.51 from a TerrainData instance via

Code (CSharp):

1. Unity.Physics.TerrainCollider.Create(heights, size, scale collisionMethod, collisionFilter)

So far I haven't figured out how to pass information about terrain holes into the TerrainCollider. I've tried passing negative values, float.NaN, float.NegativeInfinity as height values, but that does not work as expected or results in errors.

Is there a way to pass hole information into the TerrainCollider?