curveFactor property
The curveFactor
option for all links. Value higher than 0 will
curve the link clockwise. A negative value will curve it counter
clockwise. If the value is 0 the link will be a straight line. By
default undefined curveFactor get an automatic curve.
API Docs: https://api.highcharts.com/highcharts/series.flowmap.curveFactor
Implementation
double? curveFactor;