static L indexedNodes_withInvalids(S s) { s = ai_shortenForIndex(s); L l = cachedNodeIndex().get(s), l1 = l; for (VirtualNodeIndex i : virtualNodeIndices()) { L x = i.get(s); if (nempty(x)) { if (l == l1) l = cloneList(l); l.addAll(x); } } ret l; }