generateGroup function
A section's rows alone, for a group under a header its caller lays out.
Implementation
Widget generateGroup(Iterable<Widget> items) {
return Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
...items.mapIndexed<Widget>(
(index, item) => ItemPositionProvider(
position: ItemPosition.get(index, items.length),
child: item,
),
),
],
);
}