How do I add a group title to PGFPlotsX?

Specific Domains Visualization
1

Hello!

Suppose I have the code from the doc, https://kristofferc.github.io/PGFPlotsX.jl/stable/examples/axislike/:

x = range(0; stop =2*pi, length = 100)
@pgf GroupPlot(
    {
        group_style =
        {
            group_size="2 by 1",
            xticklabels_at="edge bottom",
            yticklabels_at="edge left"
        },
        no_markers
    },
    {},
    PlotInc(Table(x, sin.(x))),
    PlotInc(Table(x, sin.(x .+ 0.5))),
    {},
    PlotInc(Table(x, cos.(x))),
    PlotInc(Table(x, cos.(x .+ 0.5))))

Which produces:

image

How do I add a group title on top of it, similar to how I could use “plot_title”?

Kind regards