code: public static void attributeAbsent(Class<?> aClass,Attribute aField){
  		throw new XmlMappingAttributeDoesNotExistException(MSG.INSTANCE.message(xmlMappingAttributeDoesNotExistException2,aField.getName(),aClass.getSimpleName(),"API"));
  	}
docs: Thrown if the attribute doesn't exist in aClass.
  @param aClass class that not contains aField
  @param aField the missing field