/// <summary>
/// Expert: remove a previously added <see cref="IReaderClosedListener"/>.
/// <para/>
/// @lucene.experimental
/// </summary>
public void RemoveReaderClosedListener(IReaderClosedListener listener)
{
EnsureOpen();
readerClosedListeners.Remove(listener);
}
/// <summary>
/// Expert: adds a <see cref="IReaderClosedListener"/>. The
/// provided listener will be invoked when this reader is closed.
/// <para/>
/// @lucene.experimental
/// </summary>
public void AddReaderClosedListener(IReaderClosedListener listener)
{
EnsureOpen();
readerClosedListeners.Add(listener);
}