def exportValue(self, vf, value):
        m = StrStrHashMap(value)
        keysAndValues = []
        for i in m.keys():
            keysAndValues.append(i)
            keysAndValues.append(m[i])
def __str__(self):
        return "(%s,%s)/%d" % (self.saddr, self.gaddr, self.glen)