How do I use the ProBuilder API to create an object with a hole?

Hello

I'm trying to understand how to use the CreateShapeFromPolygon function to create 3D objects with holes.

I wrote this:

Code (CSharp):

1. List<Vector3> tempControlPoints = new List<Vector3>();
2. tempControlPoints.Add(new Vector3(-0.5f, -0.5f, 0));
3. tempControlPoints.Add(new Vector3(0.5f, 0.5f, 0));
4. tempControlPoints.Add(new Vector3(0.5f, -0.5f, 0));
5. tempControlPoints.Add(new Vector3(-0.5f, 0.5f, 0));
6.  
7. IList<IList<Vector3>> tempHolePoints = new List<IList<Vector3>>();
8. tempHolePoints.Add(new List<Vector3>());
9. tempHolePoints[0].Add(new Vector3(-0.25f, -0.25f, 0));
10. tempHolePoints[0].Add(new Vector3(0.25f, 0.25f, 0));
11. tempHolePoints[0].Add(new Vector3(0.25f, -0.25f, 0));
12. tempHolePoints[0].Add(new Vector3(-0.25f, 0.25f, 0));
13.  
14. ProBuilderMesh mesh = ProBuilderMesh.Create();
15.  
16. Debug.Log(mesh.CreateShapeFromPolygon(tempControlPoints, 1, false, tempHolePoints).status);
17.  
18. mesh.ToMesh();
19. mesh.Refresh();

I was expecting a cube with a square hole. But the Action result status is always a failure.

Where am I going wrong?