whiteBox method
Wraps the widget in a ColoredBox with white color.
Uses CupertinoColors.white which provides a pure white background. This color does not adapt to light/dark mode and remains consistently white.
Returns a ColoredBox containing the current widget with white background.
Example:
Text('Light Mode').whiteBox()
Implementation
ColoredBox whiteBox() => coloredBox(CupertinoColors.white);