dataToPoint2 method
Implementation
Offset dataToPoint2(int xAxisIndex, DynamicData x, int yAxisIndex, DynamicData y) {
double dx = _xMap[props.xAxisList[xAxisIndex]]!.dataToPoint(x);
double dy = _yMap[props.yAxisList[yAxisIndex]]!.dataToPoint(y);
return Offset(dx, dy);
}