How to dissolve all weldments in assembly BOM?

Hi,

I'm trying to use SW API to dissolve all welded components in assembly BOM and I just can't find specific method for this.

When an assembly contains few hundred parts it is very troublesome to manually select each of them.

Alternatively, collapsing all positions that refers to welded parts should do the trick, then users could manually select multiple BOM items using Shift + select and finally click 'Dissolve'.

Chris