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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 _skip_saveframe(self, lexer):
 """Skip entire saveframe - keep emitting tokens until the end of saveframe. :param lexer: instance of the lexical analyzer class. :type lexer: :class:`~nmrstarlib.bmrblex.bmrblex` :return: None :rtype: :py:obj:`None` """

        token = u""
        while token != u"save_":
            token = next(lexer)