EnumConstantImpl<T,C,F,M> last = null;
F[] constants = nav().getEnumConstants(clazz);
for( int i=constants.length-1; i>=0; i-- ) {
F constant = constants[i];
String name = nav().getFieldName(constant);
XmlEnumValue xev = builder.reader.getFieldAnnotation(XmlEnumValue.class, constant, this);
String literal;
if(xev==null) literal = name;
else literal = xev.value();
last = createEnumConstant(name,literal,constant,last);
}
this.firstConstant = last;
}