def _get_calculated_value(self, value):
        """
        Get's the final value of the field and runs the lambda functions
        recursively until a final value is derived.

        :param value: The value to calculate/expand
        :return: The final value
        """
        if isinstance(value, types.LambdaType):
            expanded_value = value(self.structure)
            return self._get_calculated_value(expanded_value)
        else:
            # perform one final parsing of the value in case lambda value
            # returned a different type
            return self._parse_value(value)
Get's the final value of the field and runs the lambda functions
        recursively until a final value is derived.

        :param value: The value to calculate/expand
        :return: The final value