# File lib/chef/provider/group/dscl.rb, line 69
        def set_gid
          @new_resource.gid(get_free_gid) if [nil,""].include? @new_resource.gid
          raise(Chef::Exceptions::Group,"gid is already in use") if gid_used?(@new_resource.gid)
          safe_dscl("create /Groups/#{@new_resource.group_name} PrimaryGroupID #{@new_resource.gid}")
        end