Questioning the Generator Syntax of Effect.gen

export const program = Effect.gen(function* (_) {
  const a = yield* _(task1)
  const b = yield* _(task2)
  const n1 = yield* _(divide(a, b))
  const n2 = increment(n1)
  return `Result is: ${n2}`
})

export const program = Effect.gen((_) => {
  const a = yield* _(task1)
  const b = yield* _(task2)
  ...
})