yellowBox method
Wraps the widget in a ColoredBox with system yellow color.
Uses CupertinoColors.systemYellow which adapts to light/dark mode. This is the standard yellow color used throughout iOS interfaces, commonly used for warnings or attention-grabbing elements.
Returns a ColoredBox containing the current widget with yellow background.
Example:
Icon(CupertinoIcons.exclamationmark_triangle).yellowBox()
Implementation
ColoredBox yellowBox() => coloredBox(CupertinoColors.systemYellow);