Attributes for metric points

[gabswb]

Hi,
In the opentelemtry specifications, it is indicated that independent attributes can be attached to each data point: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/data-model.md#metric-points.
However I don't see how to do it because when I add attributes like this: counter->Add(1, {{"foo", 2}}) , the attributes are attached to the time serie and I get a different curve for each differente attributes in Grafana for example.
Did I miss something?