How to check if series is hidden when a user clicks on legend in ApexCharts

[matthijs88]

I'm using a stacked bar chart with ApexCharts. It is default functionality from ApexChart that clicking on an item in the legend hides that series in the graph. I have annotations that only make sense when all series are shown, so I want to hide these annotations when a user clicks on an item in the legend.

I am currently trying a solution where I listen to the legendClick event, but I'm not sure how to determine if one series is currently hidden.