    # File lib/chef/provider/group/groupmod.rb, line 106
            def set_options(overwrite_gid=false)
              opts = ""
              if overwrite_gid || @new_resource.gid && (@current_resource.gid != @new_resource.gid)
                opts << " -g '#{@new_resource.gid}'"
              end
              if overwrite_gid
                opts << " -o"
              end
              opts << " #{@new_resource.group_name}"
              opts
            end