static LS findFunctionDefsAtCurlyLevel_indexed(int targetCurlyLevel, IContentsIndexedList2<S> tok) {
  new LS functions;
  new OrderedMultiIterator<HasIndex> multiIterator;
  
  for (keyword : findFunctionDefs_keywords())
    multiIterator.add(tok.indicesOf_treeSetOfHasIndex(keyword));
  multiIterator.add(tok.indicesOf_treeSetOfHasIndex("{"));
  multiIterator.add(tok.indicesOf_treeSetOfHasIndex("}"));
  multiIterator.add(tok.indicesOf_treeSetOfHasIndex("meta"));
  
  int curlyLevel = 0;
  new BitSet ignore;
  while (multiIterator.hasNext()) {
    HasIndex idx = multiIterator.next();
    int i = idx!;
    if (ignore.get(i)) continue;
    S t = tok.get(i);
  
    // Account for meta-for (don't change curly level)
    if (eq(t, "meta")) {
      if (eqSubList(tok, i+1, "", "-", "", "for")) {
        var r = tok_findFirstBlock(tok, i);
        ignore.set(r.start);
        ignore.set(r.end-1);
      }
    } else if (eq(t, "{"))
      ++curlyLevel;
    else if (eq(t, "}"))
      --curlyLevel;
    else // it's a function keyword
      if (curlyLevel == targetCurlyLevel)
        findFunctionDefs_step(tok, i, functions);
  }
  
  ret functions;
}

Began life as a copy of #1034500