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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 get_original_field_value(self, name):
 """ Returns original field value or None """

        name = self.get_real_name(name)

        try:
            value = self.__original_data__[name]
        except KeyError:
            return None

        try:
            return value.export_original_data()
        except AttributeError:
            return value