void AddVisited(IQueryElement element, IQueryElement?newElement)
{
if (!VisitedElements.ContainsKey(element))
{
VisitedElements[element] = newElement;
}
}
IQueryElement?GetCurrentReplaced(IQueryElement element)
{
if (VisitedElements.TryGetValue(element, out var replaced))
{
if (replaced != null && replaced != element)
{
while (replaced != null && VisitedElements.TryGetValue(replaced, out var another))
{
if (replaced == another)
{
break;
}
replaced = another;
}
}
return(replaced);
}
return(null);
}