[Closed] Normalized vertices in skin documentation error

I want to unnormalize a vertex via maxscript
skinOps.unNormalizeVertex <Skin> <vertex_integer>
“Unnormalizes the specified vertex. A normalized vertex’ weights will sum up to 1.”

so I Write for vertex 1

skinOps.unNormalizeVertex $.modifiers[#Skin] 1
– Argument count error: unNormalizeVertex wanted 3, got 2

Strange. So I put a third parameter(that must be a boolean)

skinOps.unNormalizeVertex $.modifiers[#Skin] 1 true

If true the vertex is unnormalized, else is normalized again.