# File lib/chef/provider/group/gpasswd.rb, line 42
        def modify_group_members
            if(@new_resource.append)
              unless @new_resource.members.empty?
                @new_resource.members.each do |member|
                  Chef::Log.debug("#{@new_resource} appending member #{member} to group #{@new_resource.group_name}")
                  shell_out!("gpasswd -a #{member} #{@new_resource.group_name}")
                end
              else
                Chef::Log.debug("#{@new_resource} not changing group members, the group has no members to add")
              end
            else
              unless @new_resource.members.empty?
                Chef::Log.debug("#{@new_resource} setting group members to #{@new_resource.members.join(', ')}")
                shell_out!("gpasswd -M #{@new_resource.members.join(',')} #{@new_resource.group_name}")
              else
                Chef::Log.debug("#{@new_resource} setting group members to: none")
                shell_out!("gpasswd -M \"\" #{@new_resource.group_name}")
              end
            end
        end