message: Docs: Fixed wrong type check
  Fixes
diff: @@ -198,7 +198,7 @@ Actually, `autoscaleInfoProvider` function has an argument `original` which is t
  const firstSeries = chart.addLineSeries({
  autoscaleInfoProvider: original => {
  const res = original();
  - if (res.priceRange !== null) {
  + if (res !== null) {
  res.priceRange.minValue -= 10;
  res.priceRange.maxValue += 10;
  }
  