classes: {
  GREEN: {style.stroke: "#2b9464"; style.fill: "#2b9464"}
  RED: {style.stroke: "#d14d28"; style.fill: "#d14d28"}
  YELLOW: {style.stroke: "#f5df65"; style.fill: "#f5df65"}
  BLUE: {style.stroke: "#59c8df"; style.fill: "#59c8df"}
}

grid-rows: 2
grid-columns: 2
grid-gap: 0

1: "link" {class: RED; link: "example.com"}
2: "none" {class: YELLOW}
3: "link, tooltip" {class: BLUE; link: "example.com"; tooltip: tooltip}
4: "none" {class: GREEN}