detach method

  1. @override
void detach (ScrollPosition position)
override

Unregister the given position with this controller.

After this function returns, the animateTo and jumpTo methods on this controller will not manipulate the given position.

Implementation 

@override
void detach(ScrollPosition position) {
  super.detach(position);
  assert(_positionToListener.containsKey(position));
  position.removeListener(_positionToListener[position]);
  _positionToListener.remove(position);
  if (_lastUpdated == position)
    _lastUpdated = null;
  if (_positionToListener.isEmpty)
    _lastUpdatedOffset = null;
}