@abstractproperty<EOL><INDENT>def metrics(self):<DEDENT>
raise NotImplementedError<EOL>
List of exported metrics

        :return: exported metrics
        :rtype: ``dict of
                metric_name: dict('type'=python_type, 'unit'=string)``

        for instance:

        >>> def metrics(self):
            return dict(
                rmax=dict(type=float, unit='Gflops'),
                parallel_efficiency=dict(type=float, unit='percent')
            )