Charts 3: Horizontally scrolling BarChart in a vertically scrolling UIScrollView?

I'm displaying a (Charts 3.0) BarChartView in a UIScrollView (a UITableView to be specific.)

The BarChartView is scaled on the X axis only (`setScaleMinima(n, scaleY:1)`) so the Bar chart horizontally scrolls the data set.

What's the technique for enabling the containing UIScrollView to scroll vertically, when a vertical Pan gesture occurs on the BarChartView?

`Charts.BarLineChartViewBase.panGestureRecognized(_:)` purposely prevents the containing Scroll view from scrolling during the Pan gesture. Paraphrasing:
```
if recognizer.state == NSUIGestureRecognizerState.began {
if self.isDragEnabled && // true
(!self.hasNoDragOffset || !self.isFullyZoomedOut) { // hasNoDragOffset: true, isFullyZoomedOut: false because viewPortHandler.isFullyZoomedOutX is false
let translation = recognizer.translation(in: self) // .x: 0, y: -n
let didUserDrag = (self is HorizontalBarChartView) ? translation.y != 0.0 : translation.x != 0.0
if didUserDrag && !performPanChange(translation: translation) { // didUserDrag: false
} else {
_outerScrollView?.nsuiIsScrollEnabled = false // _outerScrollView: my UIScrollView
}
```
Note that my Bar chart does not scroll vertically, and the pan gesture translation is Y-axis only, yet Bar chart disables ScrollView scrolling for the lifetime of the gesture.

`BarLineChartViewBase.gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:)` is written to allow a ScrollView superview to recognize Pan gestures, and sets `_outerScrollView` to my containing ScrollView, so clearly a ScrollView-contains-a-BarChartView hierarchy is supported.

I've searched all the "scroll" Issues here, and SO [ios-charts], but come up empty for a Chart 3 solution.

I'm just stumped on how to configure my scaled-on-X-axis-Bar chart to allow Y-axis pan gestures to the Scroll view.

Help appreciated. Thank you.

Start in BarLineChartViewBase.panGestureRecognized(_:) and gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:), which the issue identifies as controlling the chart and containing UIScrollView gestures. Trace how vertical and horizontal translations affect _outerScrollView and performPanChange. Done means vertical pans reach the containing UIScrollView while horizontally scaled BarChartView scrolling still works.

Written by the indexing model from the issue text.