public IEnumerable <AVLNode> Range(TKey lower, TKey upper)
{
foreach (var item in AVLNode.EnumerateFrom(_root, lower, _comparison))
{
var comparison = _comparison;
if (comparison(item.Key, upper) > 0)
{
break;
}
yield return(item);
}
}
public IEnumerable <AVLNode <TKey, TValue> > Range(TKey lower, TKey upper)
{
foreach (var item in AVLNode <TKey, TValue> .EnumerateFrom(_root, lower, _comparer))
{
var comparer = _comparer;
if (comparer.Compare(item.Key, upper) > 0)
{
break;
}
yield return(item);
}
}