build method
Builds the final widget for this display mode for this item. Sub-classes implement this to build the widget that is appropriate for the given display mode (in toolbar or overflowed).
Implementation
@override
Widget build(BuildContext context, ToolbarItemDisplayMode displayMode) {
if (displayMode == ToolbarItemDisplayMode.inToolbar) {
return SizedBox(
width: spacerUnits * _kToolbarItemWidth,
);
} else {
return const SizedBox.shrink();
}
}