// Render ordering
interface OrderFn = (series: SeriesIdentifier) => number; // number to use as global z-index
interface OrderSortFn = (seriesA: SeriesIdentifier, seriesB: SeriesIdentifier) => -1 | 0 | 1; // relative ordering of series
type Order = OrderFn | OrderSortFn | number // number would be the simplest ordering or spec
interface BasicSeriesSpec {
  order: Order;
}

// Edge clippings
interface EdgeClippingProps {
  lineWidth?: boolean; // including line width on edge
  points?: boolean; // including point radius on edge
  highlighter?: boolean; // include all highlighter elements outside of chart area
  padding?: number; // max padding for clippings
}
interface SettingsSpec {
  // not sure if Settings is the right place for this but it should be a global thing
  edgeClipping: EdgeClippingProps;
  ...
}