kubectl update service "${kube_flags[@]}" service-${version}-test--patch="{\"selector\":{\"my\":\"test-label\"},\"apiVersion\":\"v1beta1\"}"
kubectl update service "${kube_flags[@]}" service-${version}-test--patch="{\"spec\":{\"selector\":{\"my\":\"test-label\"}},\"apiVersion\":\"v1beta3\"}"--api-version=v1beta3
# Post-condition: selector.version == ${version}
# Post-condition: selector has "test-label" label.