// +optional
  repeated Subject subjects = 2;

  // RoleRef can only reference a ClusterRole in the global namespace.
  // If the RoleRef cannot be resolved, the Authorizer must return an error.
  optional RoleRef roleRef = 3;
}

// ClusterRoleBindingList is a collection of ClusterRoleBindings.
// Deprecated in v1.17 in favor of rbac.authorization.k8s.io/v1 ClusterRoleBindings, and will no longer be served in v1.22.

  // +optional
  repeated Subject subjects = 2;

  // RoleRef can only reference a ClusterRole in the global namespace.
  // If the RoleRef cannot be resolved, the Authorizer must return an error.
  optional RoleRef roleRef = 3;
}

// ClusterRoleBindingList is a collection of ClusterRoleBindings.

  // valid against the audience of the Kubernetes API server.
  // +optional
  repeated string audiences = 4;

  // Error indicates that the token couldn't be checked
  // +optional
  optional string error = 3;
}

// UserInfo holds the information about the user needed to implement the
// user.Info interface.
message UserInfo {

  // +optional
  optional VolumeError detachError = 4;
}

// VolumeError captures an error encountered during a volume operation.
message VolumeError {
  // time represents the time the error was encountered.
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time time = 1;

  // message represents the error encountered during Attach or Detach operation.