public void AddEntries(IList <Entry> forwards, IList <Entry> backwards, Action <int, int> notify = null)
{
if (notify == null)
{
forwardsSection.AddEntries(forwards, null);
reverseSection.AddEntries(backwards, null);
}
else
{
forwardsSection.AddEntries(forwards, (i, n) => notify(i, n + backwards.Count));
reverseSection.AddEntries(backwards, (i, n) => notify(i + forwards.Count, n + forwards.Count));
}
}
