SliverPositioned.fill constructor
const
SliverPositioned.fill({})
Creates a Positioned object with left, top, right, and bottom set to 0.0 unless a value for them is passed.
Implementation
const SliverPositioned.fill({
Key? key,
this.left = 0.0,
this.top = 0.0,
this.right = 0.0,
this.bottom = 0.0,
required Widget child,
}) : width = null,
height = null,
super(key: key, child: child);