text: public String distanceSubQueryNotAllowed() {Iterator<?> sqi = getSubQueriesIterator();while (sqi.hasNext()) {Object leq = sqi.next();if (leq instanceof DistanceSubQuery) {DistanceSubQuery dsq = (DistanceSubQuery) leq;String m = dsq.distanceSubQueryNotAllowed();if (m != null) {return m;}} else {return "Operator " + getOperatorName() + " does not allow subquery " + leq.toString();}}return null; }