copy method
Implementation
@override
copy(source) {
super.copy(source);
aX = source.aX;
aY = source.aY;
xRadius = source.xRadius;
yRadius = source.yRadius;
aStartAngle = source.aStartAngle;
aEndAngle = source.aEndAngle;
aClockwise = source.aClockwise;
aRotation = source.aRotation;
return this;
}