# File lib/aws/sns/originators/from_auto_scaling.rb, line 38
      def event
        return @event if defined? @event
        e = body['Event']
        @event = case
          when e =~ /EC2_INSTANCE_TERMINATE/ then :ec2_instance_terminate
          when e =~ /EC2_INSTANCE_TERMINATE_ERROR/ then :ec2_instance_terminate_error
          when e =~ /EC2_INSTANCE_LAUNCH/ then :ec2_instance_launch
          when e =~ /EC2_INSTANCE_LAUNCH_ERROR/ then :ec2_instance_launch_error
          when e =~ /TEST_NOTIFICATION/ then :test_notification
          else :unknown
        end
      end