private static void addPrefixed(PrefixedUnit unit) {
Map<Prefix, PrefixedUnit> basicUnitPrefixes;
if (UnitFactory.PREFIXED.containsKey(unit.getBaseUnit())) {
basicUnitPrefixes = UnitFactory.PREFIXED.get(unit.getBaseUnit());
} else {
basicUnitPrefixes = new HashMap<Prefix, PrefixedUnit>();
UnitFactory.PREFIXED.put(unit.getBaseUnit(), basicUnitPrefixes);
}
basicUnitPrefixes.put(unit.getPrefix(), unit);
}
