public Map<String, Object> asUpdatableMap() {
        return CollectionUtils.wrap(
            "service", this.service,
            "json", this.json,
            "principal", this.principal,
            "attributes", this.attributes);
    }
Map of fields that can be updated by the registry.

@return the map
support/cas-server-support-gcp-firestore-ticket-registry/src/main/java/org/apereo/cas/ticket/registry/GoogleCloudFirestoreTicketDocument.java