xpandlinks=true data-repo=istio>$ function join_by { local IFS=&#34;$1&#34;; shift; echo &#34;$*&#34;; }
$ ALL_CLUSTER_CIDRS=$(gcloud --project $PROJECT_ID container clusters list --format=&#39;value(clusterIpv4Cidr)&#39; | sort | uniq)
$ ALL_CLUSTER_CIDRS=$(join_by , $(echo &#34;${ALL_CLUSTER_CIDRS}&#34;))
$ ALL_CLUSTER_NETTAGS=$(gcloud --project $PROJECT_ID compute instances list --format=&#39;value(tags.items.[0])&#39; | sort | uniq)
$ ALL_CLUSTER_NETTAGS=$(join_by , $(echo &#34;${ALL_CLUSTER_NETTAGS}&#3