I've seen the demo of using yAxis as if it was a separate pane, but it's basically just faking it. I'd like to have actual separate panes in the chart, so that I can have a mix of different yAxis series exist inside each of those separate panes.

like:
Pane1 : holding 2 line series with separate YAxis because of value range
Pane2: holding a column series on its own yAxis, and a line series on a yAxis

inside 1 chart, not multiple charts