@type t() :: %Reactor.Dsl.Around{
  __identifier__: any(),
  allow_async?: boolean(),
  arguments: [Reactor.Dsl.Argument.t()],
  description: nil | String.t(),
  fun: mfa() | Reactor.Step.Around.around_fun(),
  guards: [Reactor.Dsl.Where.t() | Reactor.Dsl.Guard.t()],
  name: atom(),
  steps: [Reactor.Dsl.Step.t()]
}