Missing Description - 2-Edge Vertices All - Closed

Seems that i stumbled across another tool without description. And i can`t find it in the manual neither. What does this tool?

AFAIK

It is for selecting vertex with only 2 edges.

Yes, that`s what the name suggests. But i don`t really trust names in Nvil

That was my findings(I was not just assuming from name), It does select a vertex with only 2 edges. I have checked in the past.

I just checked again.

2-Edge vertex All/closed = Will select all vertex with only 2 edges
2-Edge Vertex closed/All = Will select vertex with only 2 edges that are fully enclosed by polygons (the 2 edges connected to the vertex are also each connected to 2 polygons).

Thanks Steve