public override void detach(ScrollPosition position)
{
base.detach(position);
D.assert(this._positionToListener.ContainsKey(position));
position.removeListener(this._positionToListener[position]);
this._positionToListener.Remove(position);
if (this._lastUpdated == position)
{
this._lastUpdated = null;
}
if (this._positionToListener.isEmpty())
{
this._lastUpdatedOffset = null;
}
}
public virtual void detach(ScrollPosition position)
{
D.assert(this._positions.Contains(position));
position.removeListener(this.notifyListeners);
this._positions.Remove(position);
}