"INSTANCE_IPS": "127.0.0.1",
      "ISTIO_VERSION": "version",
      "PILOT_SAN": [
        "istiod.istio-system.svc"
      ]
    },
    "locality": {},
    "UserAgentVersionType": null
  },
  "certificate_providers": {
    "default": {
      "plugin_name": "file_watcher",
      "config": {
        "certificate_file": "/cert/path/cert-chain.pem",
        "private_key_file": "/cert/path/key.pem",

}

type CertificateProvider struct {
	PluginName string `json:"plugin_name,omitempty"`
	Config     any    `json:"config,omitempty"`
}

func (cp *CertificateProvider) UnmarshalJSON(data []byte) error {
	var dat map[string]*json.RawMessage
	if err := json.Unmarshal(data, &dat); err != nil {
		return err
	}
	*cp = CertificateProvider{}

	if pluginNameVal, ok := dat["plugin_name"]; ok {