swift - ios-charts visible data in LineChartView -

i'm trying figure out how calculate data indices (along x axis) in range after panning/zooming chart.

for example, when zoom in on linechart, want able update tableview show details data points visible.

i've searched code , documentation can find, no avail.

there highestvisiblexindex , lowestvisiblexindex should you. hope see issue earlier, weekend not on so