borderRadius property
The corner radius of the border surrounding each column or bar. A number
signifies pixels. A percentage string, like for example 50%
, signifies
a relative size. For columns this is relative to the column width, for
pies it is relative to the radius and the inner radius.
API Docs: https://api.highcharts.com/highcharts/series.wordcloud.borderRadius
Implementation
Map<String, dynamic>? borderRadius;