def polling_command(self):
        raise NotImplementedError
        # submitter = CommandSubmitter(self.name, id)
        # command = ''
        # return [(submitter, command)]
Returns the estimated covariance of the values in the passed
dataset/ETHPy150Open KavenC/Linot/linot/base_interface.py/BaseInterface.polling_command--crossover with--dataset/ETHPy150Open radlab/sparrow/src/main/python/third_party/stats.py/acov