_PointObject :: (PositionStructureClass fc a) =>
  Prism' (GeometryStructure Point a fv fc) (GeometryObject a)
_PointObject = _Point . iso GeometryPoint (\(GeometryPoint a) -> a)
_PointObject :: (PositionStructureClass fc a) =>
  Prism' (GeometryStructure Point a fv fc) (GeometryObject a)
_PointObject = _Point . iso GeometryPoint (\(GeometryPoint a) -> a)
_PointObject = _Point . iso GeometryPoint (\(GeometryPoint a) -> a)