copy method
Implementation
@override
void copy(BaseDataSet baseDataSet) {
super.copy(baseDataSet);
if (baseDataSet is BarDataSet) {
var barDataSet = baseDataSet;
barDataSet._stackSize = _stackSize;
barDataSet._barShadowColor = _barShadowColor;
barDataSet._barBorderWidth = _barBorderWidth;
barDataSet._stackLabels = _stackLabels;
barDataSet._highLightAlpha = _highLightAlpha;
}
}