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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 _init_datastore_v3_stub(self, **stub_kwargs):
 """Initializes the datastore stub using nosegae config magic"""

        task_args = dict(datastore_file=self._data_path)
        task_args.update(stub_kwargs)
        self.testbed.init_datastore_v3_stub(**task_args)