This Observable Plot example renders like this:

It translates to SveltePlot as:

<Plot grid="true" marginRight={60} facet={{ label: null }}>    <Frame />    <Dot        data={penguins}        x="culmen_length_mm"        y="culmen_depth_mm"        fx="sex"        fy="species" /></Plot>

which then renders as:

The 11 penguins withsex = null have been dropped, removing a column from the matrix of plots.

(this is one of the issues surfaced by#72)