Data - ConversionBaseConverterFrom, ToBaseConverter(Listener)(constructors)BaseConverter<From,To> allowNull(boolean allowNull)boolean allowsNull()To onConvert(From value)(extension points)BaseRepeaterConverterFrom, ToTo convert(From)(conversion)StringConverterValueObjectList<Value> asObjectList(StringList)StringList asStringList(ObjectList<Value>)(collection)BaseStringConverterValueBaseStringConverter<Value> allowEmpty(boolean allowEmpty)boolean allowsEmpty()(collection)String onToString(Value)Value onToValue(String value)(extension points)RepeaterTwoWayConverterFrom, ToFrom unconvert(To)Converter<To,From> unconverter(Listener)