add_KUBECONFIG_if_exists () {
  if [[ -f "$1" ]]; then
    local local_config
    local_config="$(mktemp)"
    cp "${1}" "${local_config}"

    kubeconfig_random="$(od -vAn -N4 -tx /dev/random | tr -d '[:space:]' | cut -c1-8)"
    container_kubeconfig+="/config/${kubeconfig_random}:"
    CONDITIONAL_HOST_MOUNTS+="--mount type=bind,source=${local_config},destination=/config/${kubeconfig_random} "
  fi
}

            },
            {
              "datasource": {
                "type": "prometheus",
                "uid": "${datasource}"
              },
              "expr": "max(rate(envoy_cluster_upstream_cx_tx_bytes_total{cluster_name=\"xds-grpc\"}[1m]))",
              "format": "time_series",
              "intervalFactor": 1,
              "legendFormat": "XDS Request Bytes Max",
              "refId": "A"
            },

"time_series", "hide": false, "intervalFactor": 1, "legendFormat": "XDS Response Bytes Average", "refId": "B" }, { "expr": "max(rate(envoy_cluster_upstream_cx_tx_bytes_total{cluster_name=\"xds-grpc\"}[1m]))", "format": "time_series", "intervalFactor": 1, "legendFormat": "XDS Request Bytes Max", "refId": "A" }, { "expr": "quantile(.5, rate(envoy_cluster_upstream_cx_tx_bytes_total{cluster_name=\"xds-grpc\"}[1m]))", "format": "time_series", "intervalFactor": 1, "legendFormat": "XDS Request Bytes Average", "refId":...