buildWithChild method
A build method that receives an extra child parameter.
This method may be called with a child different from the parameter
passed to the constructor of SingleChildStatelessModifier.
It may also be called again with a different child, without this widget
being recreated.
Implementation
@override
Widget buildWithChild(BuildContext context, Widget? child) {
return AnimatedPositionedDirectional(
key: modifierKey,
duration: duration,
curve: curve,
top: top,
bottom: bottom,
end: end,
start: start,
onEnd: onEnd,
height: height,
width: width,
child: child!,
);
}