class Unit<String> extends Enum<String> {
const Unit(String type) : super (type);
static const Unit PX = const Unit(Style._UNIT_PX);
static const Unit PCT = const Unit(Style._UNIT_PCT);
static const Unit EM = const Unit(Style._UNIT_EM);
static const Unit EX = const Unit(Style._UNIT_EX);
static const Unit PT = const Unit(Style._UNIT_PT);
static const Unit PC = const Unit(Style._UNIT_PC);
static const Unit IN = const Unit(Style._UNIT_IN);
static const Unit CM = const Unit(Style._UNIT_CM);
static const Unit MM = const Unit(Style._UNIT_MM);
}