merge method
Implementation
AppBarConfig merge(AppBarConfig? other) {
if (other == null) return this;
return copyWith(
backgroundColor: other._backgroundColor,
appBarHeight: other._appBarHeight,
leadIconBuilder: other._leadIconBuilder,
titleStyle: titleStyle.merge(other._titleStyle),
actionsStyle: actionsStyle.merge(other._actionsStyle),
titleMaxLength: other._titleMaxLength,
leftAndRightPadding: other._leftAndRightPadding,
itemSpacing: other._itemSpacing,
titlePadding: other._titlePadding,
iconSize: other._iconSize,
systemUiOverlayStyle: other._systemOverlayStyle,
showDefaultBottom: other._showDefaultBottom,
);
}