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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 first(self):
 """ Return the first result of this Query or None if the result doesn't contain any row. """

        results = self.rpc_model.search_read(
            self.domain, None, 1, self._order_by, self.fields,
            context=self.context
        )
        return results and results[0] or None