chart = Treemap(ford, {
value: d => d.size,
group: (d, n) => n.ancestors().slice(-5)[1].data.name.replace(/[0-9]/g, ''),
label: (d, n) => [...d.name.split(/(?=[A-Z][a-z])/g), Math.round(n.value)].join("\n"),
title: (d, n) => `${n.ancestors().reverse().map(d => d.data.name).join(".")}\n${n.value}`,
link: (d, n) => ``,
tile,
width: 1200,
height: 1000
})