Sankey

FAKE(csv(
`a,a1,5
a,a2,3
b,b1,8
a,b1,3
b1,a1,1
b1,c,2
`))
MAPVALUE(0, dict("source", value(0), "target", value(1), "value", value(2)))
POPVALUE(1,2)
CHART(
    chartOption({
        series: {
            type: "sankey",
            layout: "none",
            emphasis: {
                focus: "adjacency"
            },
            links: column(0),
            data: [
                {name: "a"}, {name: "b"}, {name: "a1"}, {name: "a2"}, {name: "b1"}, {name: "c"}
            ]
        }
    })
)