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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _load_version(cls, unpickler, version):
 """ A function to load a previously saved SentenceSplitter instance. Parameters unpickler : GLUnpickler A GLUnpickler file handler. version : int Version number maintained by the class writer. """

        state, _exclude, _features = unpickler.load()

        features = state['features']
        excluded_features = state['excluded_features']

        model = cls.__new__(cls)
        model._setup()
        model.__proxy__.update(state)
        model._exclude = _exclude
        model._features = _features

        return model