makeSeries method
Implementation
MutableSeries<D> makeSeries(Series<dynamic, D> series) {
  final s = MutableSeries<D>(series);
  // Setup the Renderer
  final rendererId =
      series.getAttribute(rendererIdKey) ?? SeriesRenderer.defaultRendererId;
  s.setAttr(rendererIdKey, rendererId);
  s.setAttr(rendererKey, getSeriesRenderer(rendererId));
  return s;
}