# File lib/aws/ec2/security_group_collection.rb, line 119
      def each &block

        response = filtered_request(:describe_security_groups)
        response.security_group_info.each do |info|

          group = SecurityGroup.new_from(:describe_security_groups, info, 
            info.group_id, :config => config)

          yield(group)

        end
        nil
      end