// endpoints to distinguish endpoints from each other (e.g. in DNS names).
  // Multiple endpoints which use the same hostname should be considered
  // fungible (e.g. multiple A values in DNS). Must be lowercase and pass DNS
  // Label (RFC 1123) validation.
  // +optional
  optional string hostname = 3;

  // targetRef is a reference to a Kubernetes object that represents this
  // endpoint.
  // +optional

  // externalName is the external reference that discovery mechanisms will
  // return as an alias for this service (e.g. a DNS CNAME record). No
  // proxying will be involved.  Must be a lowercase RFC-1123 hostname
  // (https://tools.ietf.org/html/rfc1123) and requires `type` to be "ExternalName".
  // +optional
  optional string externalName = 10;

// When using impersonation, users will receive the user info of the user being impersonated.  If impersonation or
// request header authentication is used, any extra keys will have their case ignored and returned as lowercase.
message SelfSubjectReview {
  // Standard object's metadata.
  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional

  // "*" matches all API groups and, if present, must be the only entry.
  // +listType=set
  // Required.
  repeated string apiGroups = 2;

  // `resources` is a list of matching resources (i.e., lowercase
  // and plural) with, if desired, subresource.  For example, [
  // "services", "nodes/status" ].  This list may not be empty.
  // "*" matches all resources and, if present, must be the only entry.
  // Required.

  // "*" matches all API groups and, if present, must be the only entry.
  // +listType=set
  // Required.
  repeated string apiGroups = 2;

  // `resources` is a list of matching resources (i.e., lowercase
  // and plural) with, if desired, subresource.  For example, [
  // "services", "nodes/status" ].  This list may not be empty.
  // "*" matches all resources and, if present, must be the only entry.
  // Required.