Stackdriver Integration

I am looking at istio-stackdriver integration and wondering whether there was a document that describes how i can filter the metrics that get pushed to stackdriver

For instance, how would i modify the following expression to exclude containers with aprticular labels.

monitoredResourceDimensions:
    container_name: conditional((destination.name | "unknown").startsWith("istio-telemetry") || (destination.name | "unknown").startsWith("istio-policy"), "mixer", destination.container.name | "unknown")