def exportValue(self, vf, value):
        m = StrStrHashMap(value)
        keysAndValues = []
        for i in m.keys():
            keysAndValues.append(i)
            keysAndValues.append(m[i])
def __new__(cls, *args, **kwargs):
        raise TypeError("Instances of {} are not allowed to be constructed!".format(cls.__name__))