builder method
Implementation
@override
Widget builder(BuildContext context) {
Widget? buildChild;
if (title != null) {
buildChild = Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: [
Flexible(child: Container(decoration: decoration, child: child)),
title!,
],
);
} else {
buildChild = Container(decoration: decoration, child: child);
}
return buildChild;
}