[Closed] Break cluster of polygons in UVW Unwrap

I’ve seen a couple of threads on this topic but none that helped me find my answer.

1. I have an object,
2. I apply a UVW Unwrap modifier
3. I select a cluster of polygons inside the UVW Unwrap editor window
4. Press break. (this wont do anything, since I selected multiple polygons and it only works on single selection)

So I tried to write a script for this.

Found the following code:

for o in selection do
(
o.modifiers[#unwrap_uvw].unwrap.breakSelected()
)
)

However this only works in vertexselection mode. How can I get this to work in Polygon mode so that the entire selection is split up in separate polygons?