On https://www.mscha.org/knmi/summer_graph_wst.cgi?station=260&year=2022&month=0, I have several data series that I'm showing in the chart, but don't want to show in the tooltip.
(The entries in the tooltip from (Warme dag) until (Grens tropische dag) are useless.)
You can easily exclude a data series from the legend, using visibleInLegend: false, but there doesn't seem to be a corresponding visibleInTooltip: false.
Setting the label of the series to '' or null doesn't help either, it wil just show the data without a label.
Is there a way to do this, without writing the complete tooltip HTML myself?
