Function step

packages/effect/src/unstable/reactivity/Atom.ts:864–868

(arr)

        while: constTrue,
        body: () => pull,
        step(arr) {
          ctx.setSelf(AsyncResult.success(Arr.lastNonEmpty(arr), {
            waiting: true
          }))
        }
      }))
  ).pipe(
    Effect.catchCause((cause) => {