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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 to_dict(self):
 """ Get a dictionary of the attributes of this Language object, which can be useful for constructing a similar object. """

        if self._dict is not None:
            return self._dict

        result = {}
        for key in self.ATTRIBUTES:
            value = getattr(self, key)
            if value:
                result[key] = value
        self._dict = result
        return result