public IEnumerable<ISide> GetSides(Direction direction, Range positionRange, Range boundsRange, bool ascending = true)
{
return _directionSidesMap[(int) direction]
.Where(s =>
positionRange.Contains(s.Position) &&
boundsRange.IsIntersect(new Range(s.Begin, true, s.End, true)))
.OrderBy(s => ascending ? s.Position : -s.Position);
}