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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 order_by(self, *criterion):
 """ apply one or more ORDER BY criterion to the query and return the newly resulting Query All existing ORDER BY settings can be suppressed by passing None - this will suppress any ORDER BY configured on mappers as well. """

        query = self._copy()
        query._order_by = criterion
        return query