merge method
Merges one GalleryHeaderThemeData with the another
Implementation
GalleryHeaderThemeData merge(GalleryHeaderThemeData? other) {
if (other == null) return this;
return copyWith(
closeButtonColor: other.closeButtonColor,
backgroundColor: other.backgroundColor,
iconMenuPointColor: other.iconMenuPointColor,
titleTextStyle: other.titleTextStyle,
subtitleTextStyle: other.subtitleTextStyle,
bottomSheetBarrierColor: other.bottomSheetBarrierColor,
);
}