public override Widget build(BuildContext context) { D.assert(WidgetsD.debugCheckHasDirectionality(context)); return(Positioned.directional( textDirection: Directionality.of(context: context), child: widget.child, start: _start?.evaluate(animation: animation), top: _top?.evaluate(animation: animation), end: _end?.evaluate(animation: animation), bottom: _bottom?.evaluate(animation: animation), width: _width?.evaluate(animation: animation), height: _height?.evaluate(animation: animation) )); }