BoundedBehavior({double contentExtent: double.INFINITY, double containerExtent: 0.0, double minScrollOffset: 0.0, @required TargetPlatform platform })

Creates a scroll behavior that does not overscroll.

Source 

BoundedBehavior({
  double contentExtent: double.INFINITY,
  double containerExtent: 0.0,
  double minScrollOffset: 0.0,
  @required TargetPlatform platform
}) : _minScrollOffset = minScrollOffset,
     super(
       contentExtent: contentExtent,
       containerExtent: containerExtent,
       platform: platform
     );