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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 max(self, spec):
 """Adds `max` operator that specifies upper bound for specific index. :Parameters: - `spec`: a list of field, limit pairs specifying the exclusive upper bound for all keys of a specific index in order. .. versionadded:: 2.7 """

        if not isinstance(spec, (list, tuple)):
            raise TypeError("spec must be an instance of list or tuple")

        self.__check_okay_to_chain()
        self.__max = SON(spec)
        return self