Is it possible to access additional vertex properties from ply file?

[marcinwalus]

Checklist

• [X] I have searched for similar issues.
• [X] For Python issues, I have tested with the latest development wheel.
• [X] I have checked the release documentation and the latest documentation (for main branch).

My Question

I have .ply file (which I'm generating) which contains xyz data, normals, color and also one additional property for vertex: confidence (of type uint8). How can I access this data from C++ code after reading such file using open3d::io::read_point_cloud() method? I would like to filter points with highest confidence only.