// since constant values are never null, no point in using the boxed types.
JType baseExposedType = e.base.toType(this, EXPOSED).unboxify();
JType baseImplType = e.base.toType(this, Aspect.IMPLEMENTATION).unboxify();
XmlEnumWriter xew = type.annotate2(XmlEnumWriter.class);
xew.value(baseExposedType);
boolean needsValue = e.needsValueField();
// for each member <m>,