def exportValue(self, vf, value):
        m = StrStrHashMap(value)
        keysAndValues = []
        for i in m.keys():
            keysAndValues.append(i)
            keysAndValues.append(m[i])
def add_item(self, item):
    self._vbox_items.pack_start(item.widget, expand=False, fill=False)