HeaderBuilder<H> typedef
HeaderBuilder<H> =
Widget Function(BuildContext context, H header)
The HeaderBuilder is a function that render a header of type H
as a
Widget, it takes a BuildContext and a H
as parameters.
It is used by GroupedListView<H, I> to render the headers of type H
Implementation
typedef HeaderBuilder<H> = Widget Function(
BuildContext context,
H header,
);