'{{ destination_workload}}.{{ destination_workload_namespace }}',
          tableLabelJoin(
            quantile(
              '0.5',
              sum(
                rate(labels('istio_request_duration_milliseconds_bucket', { reporter: '~source|waypoint' })),
                by=['le', 'destination_workload', 'destination_workload_namespace']
              )
            )
          )

                  "uid": "$datasource"
               },
               "expr": "label_join(histogram_quantile(0.5, sum by (le,destination_workload,destination_workload_namespace) (rate(istio_request_duration_milliseconds_bucket{reporter=~\"source|waypoint\"}[$__rate_interval]))), \"destination_workload_var\", \".\", \"destination_workload\", \"destination_workload_namespace\")",
               "format": "table",