Canvas2DContextAttributes to2DContextAttributes(const CanvasContextCreationAttributes& attrs)
{
    Canvas2DContextAttributes result;
    result.setAlpha(attrs.alpha());
    return result;
}
void CanvasRenderingContext2D::getContextAttributes(
    Canvas2DContextAttributes& attrs) const {
  attrs.setAlpha(creationAttributes().alpha());
  attrs.setColorSpace(colorSpaceAsString());
}