Looping on []MyType backed by []MySuperType

Hello, In a painting software defining TabletPoint which contains .position (a vector field). I have []TabletPoint. I have a transform library which acts on vectors and doesn’t bother with TabletPoint. It’s not coupled. I am writing transform.alignPoints([]@Vector(2, f32), other_params...) which only needs to act on the .position field by reference. However, that would mean allocating that list of references. I wonder if there is a way to go for accessing the .position field of my existing...