Positioned.fill constructor Null safety

const Positioned.fill(
  1. {Key? key,
  2. double? left = 0.0,
  3. double? top = 0.0,
  4. double? right = 0.0,
  5. double? bottom = 0.0,
  6. required Widget child}
)

Creates a Positioned object with left, top, right, and bottom set to 0.0 unless a value for them is passed.

Implementation

const Positioned.fill({
  super.key,
  this.left = 0.0,
  this.top = 0.0,
  this.right = 0.0,
  this.bottom = 0.0,
  required super.child,
}) : width = null,
     height = null;