applyOverflowPaintTransform method
Implementation
void applyOverflowPaintTransform(RenderBox child, Matrix4 transform) {
  final Offset paintOffset = Offset(_paintOffsetX, _paintOffsetY);
  if (child is RenderBoxModel && child.renderStyle.position == CSSPositionType.fixed) {
    applyPositionFixedPaintTransform(child, transform);
  }
  transform.translate(paintOffset.dx, paintOffset.dy);
}