Available from versions: Promob 22.214.171.124 and Catalog 126.96.36.199.
The $ DrawerIndex $ assembler is available, which is responsible for checking and returning the drawer index within its compartment.
For example, if you have a module with 2 spans and place this assembler in a drawer inside one of these spans, it will return the index of that drawer to the drawers of the same type in the space in which it is.
A practical example, is that you have 4 drawers in a gap, and drawer 2 has this assembler, the location where the assembler is will return the value 2. But if they all have this assembler, they will end up returning the respective index for each.