def exportValue(self, vf, value):
        m = StrStrHashMap(value)
        keysAndValues = []
        for i in m.keys():
            keysAndValues.append(i)
            keysAndValues.append(m[i])
def serializable_fields(self):
        """ in certain cases the user model isn't serializable so you may want to only send the id """
        return self