[Vaadin chart] label style setTextShadow is missing


The pie label, when located inside pie slices, applies a shadow to the label. According to HighChart, it could be removed by setStyle(style); with a style.setTextShadow(“xxxx”). For example:

plotOptions: { series: { dataLabels: { enabled: true, style: { fontWeight:‘bold’, textShadow: “2px 2px #ff0000”, } } } },

However it seems style has a very limited selections, how do I suppose to walk around?

Vaadin version: Vaadin chart 3, alpha 3.

Many thanks!