paintElements method
Paint the elements.
Implementation
FutureOr<bool> paintElements(
    PCanvas pCanvas, List<PCanvasElement> elements, bool posPaint) {
  for (var e in elements) {
    e.paint(pCanvas);
  }
  return true;
}Paint the elements.
FutureOr<bool> paintElements(
    PCanvas pCanvas, List<PCanvasElement> elements, bool posPaint) {
  for (var e in elements) {
    e.paint(pCanvas);
  }
  return true;
}