merge method
Implementation
ScrollbarThemeData merge(ScrollbarThemeData? other) {
if (other == null) {
return this;
}
return copyWith(
disabledColor: other.disabledColor,
color: other.color,
foreground: other.foreground,
hoverColor: other.hoverColor,
highlightColor: other.highlightColor,
inhoverColor: inhoverColor,
);
}