merge method

Implementation

@override
UIDropdownMenuThemeData merge(covariant UIDropdownMenuThemeData? other) {
  return UIDropdownMenuThemeData(
    backgroundColor: other?.backgroundColor ?? backgroundColor,
    borderRadius: other?.borderRadius ?? borderRadius,
    boxShadow: other?.boxShadow ?? boxShadow,
    actionPadding: other?.actionPadding ?? actionPadding,
    actionSpacing: other?.actionSpacing ?? actionSpacing,
    iconSize: other?.iconSize ?? iconSize,
    textStyle: other?.textStyle ?? textStyle,
  );
}