docs: def report( self, params, meta, res ):
          """Return a properly-structured dict of results. The default returns a dict with
          results keyed by :attr:`Experiment.RESULTS`, the data point in the parameter space
          keyed by :attr:`Experiment.PARAMETERS`, and timing and other metadata keyed
          by :attr:`Experiment.METADATA`. Overriding this method can be used to record extra
          values, but be sure to call the base method as well.
  
          :param params: the parameters we ran under
          :param meta: the metadata for this run
          :param res: the direct experimental results from do()
          :returns: a :term:`results dict`"""
          rc = dict()
          rc[self.PARAMETERS] = params.copy()
          rc[self.METADATA] = meta.copy()
          rc[self.RESULTS] = res
          return rc