trail method
Adds a trail mark to the chart.
A line whose width says something: a trail thickens with its size.
Returns The new mark, so its channels and properties chain.
Implementation
VlChartMark trail() {
return this.mark("trail");
}Adds a trail mark to the chart.
A line whose width says something: a trail thickens with its size.
Returns The new mark, so its channels and properties chain.
VlChartMark trail() {
return this.mark("trail");
}