AuthorizationPolicy CRD in 1.8.0 supports CUSTOM action

Does the AuthorizationPolicy supports configuration of provider for custom action?

apiVersion: "security.istio.io/v1beta1"
kind: AuthorizationPolicy
metadata:
  name: policy-b
  namespace: default
spec:
  selector:
    matchLabels:
      app: myapp
  action: CUSTOM
  provider:
    name: ext-authz-http
  rules:
  - to:
    - operation:
        paths: ["/custom"]

In AuthorizationPolicy on 1.8.0 do we have support for action: CUSTOM already? The document is confusing, as it talks about CUSTOM action in the details of provider property, but doesn’t have CUSTOM in the list of actions

It is not supported in 1.8 but will be in 1.9, the documentation issue should be fixed in https://github.com/istio/api/pull/1759