Well, since you're reading this, let me tell you a little more about HMR. Magic is actually not such a good think in software development, so if we can demystify HMR a bit, it will probably benefits you when it comes to answer setup questions or, generally, get the most out of your HMR experience.

To understand this helper, you should understand that every step invocation calls Output() for you behind the scenes. The following DSL use is identical to the one [above]. class Execute < Trailblazer::Activity::Railway step :find_provider, Output(Trailblazer::Activity::Left, :failure) => Track(:failure), Output(Trailblazer::Activity::Right, :success) => Track(:success)