docs: private void addLocalLayer() {
      LineLayer local = TrafficLayer.getLineLayer(
        Local.BASE_LAYER_ID,
        Local.ZOOM_LEVEL,
        Local.FILTER,
        Local.FUNCTION_LINE_COLOR,
        Local.FUNCTION_LINE_WIDTH,
        Local.FUNCTION_LINE_OFFSET
      );
  
      LineLayer localCase = TrafficLayer.getLineLayer(
        Local.CASE_LAYER_ID,
        Local.ZOOM_LEVEL,
        Local.FILTER,
        Local.FUNCTION_LINE_COLOR_CASE,
        Local.FUNCTION_LINE_WIDTH_CASE,
        Local.FUNCTION_LINE_OFFSET,
        Local.FUNCTION_LINE_OPACITY_CASE
      );
  
      addTrafficLayersToMap(localCase, local, placeLayerBelow());
    }