def insert(self, index, key, value):
        if key in self:
            # FIXME: efficiency?
            del self[key]
        self._sequence.insert(index, key)
        dict.__setitem__(self, key, value)
Takes ``index``, ``key``, and ``value`` as arguments.
dataset/ETHPy150Open editorconfig/editorconfig-vim/plugin/editorconfig-core-py/editorconfig/odict.py/OrderedDict.insert