how to get axes from a `Figure` in Makie

get_axis_from_figure.jl

f = Figure()
for i in 1:3, j in 1:3
    Axis(f[i, j], title = "$i, $j")
end

# pretend you get f here and want to change Axes you can't directly get as variables

ax = f.content[3]
ax.subtitle = "f.content[3]"

ax2 = content(f.layout[2, 1])
ax2.subtitle = "content(f.layout[2, 1])"

f