The standard figure of a meta-analysis, drawn the way Highcharts draws
one: a scatter of effect estimates on an inverted category
axis, with an errorbar linked over it for the confidence
intervals. Three of the things that make it a forest plot are in the
drawing and nowhere in the chart object — the weight, which is drawn as
marker area; which row is the pooled summary rather than a study; and
where the null line sits — so those are declared in the
maidr block of the series' custom subspace.
Click on the chart and use left and right arrow keys to walk the studies, and up and down at one study to walk the lower bound, the estimate and the upper bound. Each study announces its weight and whether its interval crosses the null value of 1, which is the result for that study.