TrackingScrollController constructor

TrackingScrollController({double initialScrollOffset: 0.0, bool keepScrollOffset: true, String debugLabel })

Creates a scroll controller that continually updates its initialScrollOffset to match the last scroll notification it received.

Implementation 

TrackingScrollController({
  double initialScrollOffset = 0.0,
  bool keepScrollOffset = true,
  String debugLabel,
}) : super(initialScrollOffset: initialScrollOffset,
           keepScrollOffset: keepScrollOffset,
           debugLabel: debugLabel);