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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 paginate(self, *, page_size, **options):
 """Run this query and return a page iterator. Parameters: page_size(int):
 The number of entities to fetch per page. \**options(QueryOptions, optional) Returns: Pages: An iterator for this query's pages of results. """

        return Pages(self._prepare(), page_size, QueryOptions(self, **options))