multiple drilldown
How to create a column chart that contains multiple bar and it can be drilled down which it has multiple bar too?

Drilldown from multiple series into multiple series is supported.
The relevant API option is `allowPointDrilldown`:
https://api.highcharts.com/highcharts/drilldown.allowPointDrilldown
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kamel commented
thanks a lot this helped big time
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Please see the open issue for this, https://github.com/highslide-software/highcharts.com/issues/2604. Two examples there display our proposed fix.
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Patrick commented
This seems like a basic requirement to me... not sure why it is not supported. The lack of this support required me to add a click listener and then replace the data on the chart instead of using the built-in drilldown functionality because it only supports a single series.
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muek commented
Did you find a solution to implement multiple drilldown?