fn test() {
  return startSketchOn('XY')
    |> startProfileAt([0, 0], %)
    |> line(end = [0, 1])
    |> line(end = [1, 0])
    |> line(end = [0, -1])
    |> close(%)
}

fn test2() {
  return {
    thing1 = {
      thing2 = startSketchOn('XY')
        |> startProfileAt([0, 0], %)
        |> line(end = [0, 1])
        |> line(end = [1, 0])
        |> line(end = [0, -1])
        |> close(%)
    }
  }
}

x = test()
x
  |> extrude(length = -10)

x2 = test2()
x2.thing1.thing2
  |> extrude(length = 10)