protected override bool TryGetPositions(T subKey, out IBitList positionMask)
{
if (subKeyPositions.TryGetValue(subKey, out positionMask))
{
positionMask = new BitList(positionMask);
return(true);
}
positionMask = default(IBitList);
return(false);
}
protected abstract bool TryGetPositions(T subKey, out IBitList positionMask);
