merge method
Implementation
WheelOptions merge([WheelOptions? options]) => WheelOptions(
itemExtent: options?.itemExtent ?? itemExtent,
diameterRatio: options?.diameterRatio ?? diameterRatio,
offAxisFraction: options?.offAxisFraction ?? offAxisFraction,
perspective: options?.perspective ?? perspective,
magnification: options?.magnification ?? magnification,
useMagnifier: options?.useMagnifier ?? useMagnifier,
squeeze: options?.squeeze ?? squeeze,
isCupertino: options?.isCupertino ?? isCupertino,
physics: options?.physics ?? physics,
looping: options?.looping ?? looping,
onChanged: options?.onChanged ?? onChanged,
backgroundColor: options?.backgroundColor ?? backgroundColor);