Is there an essential difference in using of `Widget` or `WidgetBuilder` to pass widget as parameter to another widget in flutter

Let's say I have a widget:

class MyWidget {
  final Widget? leading;
  final WidgetBuilder? trailing;

  Widget build(BuildContext context) {
    return Row(
      children: [
        if(leading != null ) leading,
        AnotherWidget(),
        if(trailing != null) trailing(context),
      ],
    );
}

I am curious is there any pros/cons to use WidgetBuilder instead Widget for trailing?

Yes, there are several essential differences between using a Widget and WidgetBuilder in Flutter:

1. Construction Approach:
   • With a Widget, you pass an instance of a widget that is already built.
   • With a WidgetBuilder, you use a function that returns a widget, allowing deferred construction.
2. Context Handling:
   • Widgets passed directly typically use the context they're given during construction.
   • WidgetBuilders can create and use a new context, which is useful for accessing inherited widgets or when the context might change.
3. Rebuilding capability:
   • Widgets passed directly generally don't need rebuilding with a new context.
   • WidgetBuilders allow rebuilding the widget with a new context, which can be necessary for certain scenarios.
4. Use Cases:
   • Widgets are suitable when the widget's context is sufficient and doesn't need to change.
   • WidgetBuilders are suitable when the widget needs a new context or context-specific information that might change.
5. Simplicity:
   • Widgets are simpler and more straightforward to use.
   • WidgetBuilders are slightly more complex due to the function and context handling involved.