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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 _sequenceContainer(self, store):
 """ Smash whatever we got into a list and save the result in case we are executed multiple times. This keeps us from tripping up over generators and the like. """

        if self._sequence is None:
            self._sequence = list(self.container)
            self._clause = ', '.join(['?'] * len(self._sequence))
        return self._clause