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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 _master_tops(self, load):
        '''
        Return the results from an external node classifier if one is
        specified

        :param dict load: A payload received from a minion
        :return: The results from an external node classifier
        '''
        load = self.__verify_load(load, ('id', 'tok'))
        if load is False:
            return {}
        return self.masterapi._master_tops(load, skip_verify=True)