Queries on Flutter ListView - flutter

Question

Im learning about listviews and I have the below two dart files, one using ListView builder and the other Listview. Both output the same result. I have been following the listview guide: https://pusher.com/tutorials/flutter-listviews
Below are my queries on listview:
I understand in the real world the data will be coming from an API and wanted to know which of the below options will be used and why?
Am i correct to understand that any widget like container, text can be child of within a listView?
In option 1 the ListView child is a function _buildListItemsFromLocation(). Is this a good practise or should we move the _buildListItemsFromLocation()code to a separate dart file?
Option1: ListView
class LocationListView extends StatefulWidget {
#override
_LocationListViewState createState() => _LocationListViewState();
}
class _LocationListViewState extends State<LocationListView> {
List<Container> _buildListItemsFromLocation() {
int index = 0;
return locationData.map((location) {
var container = Container(
child: Row(
children: [
Container(
margin: EdgeInsets.all(10.0),
child: Image(
image: AssetImage(location.imagePath),
width: 100.0,
height: 100.0,
fit: BoxFit.cover,
),
),
Container(
child: Text(location.name),
)
],
),
);
return container;
}).toList();
}
#override
Widget build(BuildContext context) {
return ListView(
children: _buildListItemsFromLocation(),
);
}
}
Option 2 - ListView.builder
class LocationList extends StatefulWidget {
#override
_LocationListState createState() => _LocationListState();
}
class _LocationListState extends State<LocationList> {
#override
Widget build(BuildContext context) {
return ListView.builder(
itemCount: locationData.length,
itemBuilder: (context, index) {
return Row(
children: [
Container(
margin: EdgeInsets.all(10.0),
child: Image(
image: AssetImage(locationData[index].imagePath),
width: 100.0,
height: 100.0,
fit: BoxFit.cover,
),
),
Container(
child: Text(locationData[index].name),
)
],
);
}
);
}
}

Answer 1

I use method 2 because it is easy to understand and follows the order from top to bottom so it is easy to read the code.
Any widget can be a child of another widget. Depending on how and what you use them for.
Many people say that we should create another class and then call it again rather than split as above because it affects the performance of the app. In case of using a lot but only in one screen, you can use the same method as your own.
The answer may be flawed, have nothing to give yourself.

Answer 2

If you don't know in advance list size, then create it through builder
1.1 If you create list and you know that elements count won't be more than ten or
twelve, you can create ListView from example1
Any widget can be in ListView. For convenience there is widget called
ListTile, which contains leading, trailing, title, subtitle widgets
its's ok