Positioned constructor
const
Positioned({})
Implementation
const Positioned({
required this.child,
this.top,
this.right,
this.bottom,
this.left,
this.width,
this.height,
this.inset,
this.style,
super.key,
}) : assert(left == null || right == null || width == null),
assert(top == null || bottom == null || height == null),
assert(width == null || width >= 0),
assert(height == null || height >= 0);