Utils.assert(partitions.containsKey(str), "No partition recorded for: " + str);
assert partitions.containsKey(str) : "No partition recorded for: " + str;
    private int getPartition(Object str) {	Utils.assert(partitions.containsKey(str), 		     "No partition recorded for: " + str);	return ((Integer)partitions.get(str)).intValue();    }