SizedBox constructor Null safety

const SizedBox(
  1. {Key? key,
  2. double? width,
  3. double? height,
  4. Widget? child}

Creates a fixed size box. The width and height parameters can be null to indicate that the size of the box should not be constrained in the corresponding dimension.


const SizedBox({ Key? key, this.width, this.height, Widget? child })
  : super(key: key, child: child);