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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 search_datasets(self):
 """ Returns an iterator over the Datasets on the server. :return: An iterator over the :class:`ga4gh.protocol.Dataset` objects on the server. """

        request = protocol.SearchDatasetsRequest()
        request.page_size = pb.int(self._page_size)
        return self._run_search_request(
            request, "datasets", protocol.SearchDatasetsResponse)