(self, agg_dict)
Returns an aggregation object from an aggregation dict.

        Args:
            agg_dict (dict): a dictionary containing information
                about the stored aggregation.

        Returns:
            A dict with metadata information as well as the aggregation
            object (instance of AggregationResult) from a saved aggregation
            or an empty dict if not found.
Returns an aggregation object from an aggregation dict.
Returns an aggregation object from an aggregation dict .
def get_aggregation(self, agg_dict):
        """Returns an aggregation object from an aggregation dict.

        Args:
            agg_dict (dict): a dictionary containing information
                about the stored aggregation.

        Returns:
            A dict with metadata information as well as the aggregation
            object (instance of AggregationResult) from a saved aggregation
            or an empty dict if not found.
        """
        raise NotImplementedError
def get_aggregation ( self , agg_dict ) : raise NotImplementedError