int autoBond(short order, BitSet bsA, BitSet bsB) {
		if (order == JmolConstants.BOND_ORDER_NULL)
			return autoBond(bsA, bsB);
		else if (order == JmolConstants.BOND_H_REGULAR)
			return autoHbond(bsA, bsB);
		else Logger.warn("autoBond() unknown order: " + order);
		return 0;
	}