// `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]` and `matchPolicy: Equivalent`,
  // an API request to apps/v1beta1 deployments would be converted and sent to the webhook
  // with `kind: {group:"apps", version:"v1", kind:"Deployment"}` (matching the rule the webhook registered for),

	}
	return nil
}

func getAnnotationOrDefault(name string, annotations map[string]string) (isFound bool, val string, err error) {
	if _, ok := annotationRegistry[name]; !ok {
		return false, "", fmt.Errorf("no registered annotation with name=%s", name)
	}
	// use annotation value if present
	if val, found := annotations[annotationRegistry[name].key]; found {
		if err := annotationRegistry[name].validator(val); err != nil {

  // `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]` and `matchPolicy: Equivalent`,
  // an API request to apps/v1beta1 deployments would be converted and sent to the webhook
  // with `kind: {group:"apps", version:"v1", kind:"Deployment"}` (matching the rule the webhook registered for),

// +protobuf=true
// +k8s:openapi-gen=true
message Unknown {
  optional TypeMeta typeMeta = 1;

  // Raw will hold the complete serialized object which couldn't be matched
  // with a registered type. Most likely, nothing should be done with this
  // except for passing it through the system.
  optional bytes raw = 2;

  // ContentEncoding is encoding used to encode 'Raw' data.

)

const (
	// Location to read istioctl defaults from
	defaultIstioctlConfig = "$HOME/.istioctl/config.yaml"
)

var (
	// IstioConfig is the name of the istioctl config file (if any)
	IstioConfig = env.Register("ISTIOCONFIG", defaultIstioctlConfig,
		"Default values for istioctl flags").Get()

	LoggingOptions = defaultLogOptions()

	LogFormat  = "log"
	JSONFormat = "json"
	YAMLFormat = "yaml"
)

var (
	MsgOutputFormatKeys = []string{LogFormat, JSONFormat, YAMLFormat}
	MsgOutputFormats    = make(map[string]bool)
	termEnvVar          = env.Register("TERM", "", "Specifies terminal type.  Use 'dumb' to suppress color output")
)

func init() {
	for _, key := range MsgOutputFormatKeys {
		MsgOutputFormats[key] = true
	}
}

message CSIVolumeSource {
  // driver is the name of the CSI driver that handles this volume.
  // Consult with your admin for the correct name as registered in the cluster.
  optional string driver = 1;

  // readOnly specifies a read-only configuration for the volume.
  // Defaults to false (read/write).
  // +optional
  optional bool readOnly = 2;

    cs-->pc
    sd-->ep
```

### Config Translation

option go_package = "k8s.io/api/policy/v1beta1";

// AllowedCSIDriver represents a single inline CSI Driver that is allowed to be used.
message AllowedCSIDriver {
  // Name is the registered name of the CSI driver
  optional string name = 1;
}

// AllowedFlexVolume represents a single Flexvolume that is allowed to be used.
message AllowedFlexVolume {
  // driver is the name of the Flexvolume driver.

	"istioNamespace":      env.Register("ISTIOCTL_ISTIONAMESPACE", constants.IstioSystemNamespace, "The istioctl --istioNamespace override"),
	"xds-address":         env.Register("ISTIOCTL_XDS_ADDRESS", "", "The istioctl --xds-address override"),
	"xds-port":            env.Register("ISTIOCTL_XDS_PORT", 15012, "The istioctl --xds-port override"),
	"authority":           env.Register("ISTIOCTL_AUTHORITY", "", "The istioctl --authority override"),