static L<GazelleTree> gazelle_getChildren_withContinuations(GazelleTree tree, O... _) {
  L<GazelleTree> l = gazelle_getChildren(tree, _);
  bool debug = boolPar debug(_) || boolPar debugContinuations(_);
  
  new Matches m;
  bool changes = false;
  for i over l: {
    GazelleTree t = l.get(i);
    continue unless eq(t.lineType, 'instruction)
      && match("continue with line * of rule * without variables", t.line, m);
      
    if (debug) print("Processing continuation: " + sfu(m));

    S ruleID = $2;
    RuleEngine2.Rule rule = t.ctx.engine.getRule(ruleID);
    if (rule == null) {
      print("Follow-up rule not found: " + ruleID);
      continue with l.remove(i--);
    }
    
    set changes;
    t.mr.rule = rule;
    t.mr.iCond = parseInt($1)-1;
    t.mr.map = ciMap();
    // TODO: remainingConditions?
    
    if (!t.mr.moreConditions()) {
      t.line = rule.out;
      t.lineType = rule.outType();
    }

    gazelle_addPredictionToTreeNode(t);
  }

  if (changes) gazelle_sortChildren(l);
  ret l;
}

Began life as a copy of #1021556