code: func GamepadAxis(id int, axis int) float64 {
  	return uiDriver().Input().GamepadAxis(id, axis)
  }
docs: // GamepadAxis returns the float value [-1.0 - 1.0] of the given gamepad (id)'s axis (axis).
  //
  // GamepadAxis is concurrent-safe.
  //
  // GamepadAxis always returns 0 on mobiles.