MaterialRectCenterArcTween constructor Null safety

  1. {Rect? begin,
  2. Rect? end}

Creates a Tween for animating Rects along a circular arc.

The begin and end properties must be non-null before the tween is first used, but the arguments can be null if the values are going to be filled in later.


  Rect? begin,
  Rect? end,
}) : super(begin: begin, end: end);