Search for Main Group Not all Subgroup

Question

Search for Main Group Not all Subgroup
My illustrator project may have 5 main groups, which may all included 100 subgroups. I would like to search for main group without having to search through all subgroup, because too many and too long for the script.
For the moment I have given a name to all Main group but the process is much too long.
Marcel
tell application "Adobe Illustrator"
                   activate
                          set groupCount to count group items in current document
                          repeat with i from 1 to groupCount
                                                set selection of current document to {}
                                                set groupRef to group item i of current document
                                                set groupName to name of groupRef
                                                if  (groupName contains "MainGroup") then
                                                                                      set selected of (groupRef) to true
                                                  display dialog groupName
                                                                    end if
                          end repeat -- with groupCounter from 1 to groupCounter
end tell

Answer 1

I don't do AS but this seems to be the culprit
set groupCount to count group items in current document
count your groups in the current "Layer" to narrow it down to main groups only, groups within groups will be ignored.