getTransformed = (
mark = Plot.barY(data, { x: "species", y: "body_mass" }),
{ refData = null } = []
) => {
const { facets, channels } = mark.initialize();
const keys = Object.keys(channels);
return Array.from(facets[0], (i) =>
Object.fromEntries(Array.from(keys, (key) => [key, channels[key].value[i]]))
);
}