// The only valid values for this field are 'Apply' and 'Update'.
  optional string operation = 2;

  // APIVersion defines the version of this resource that this field set
  // applies to. The format is "group/version" just like the top-level
  // APIVersion field. It is necessary to track the version of a field
  // set because it cannot be automatically converted.

  // must be given precedence over this field. The controller may emit a
  // warning if the field and annotation have different values.
  // Implementations of this API should ignore Ingresses without a class
  // specified. An IngressClass resource may be marked as default, which can
  // be used to set a default value for this field. For more information,
  // refer to the IngressClass documentation.

  // This field is set via the /status subresource. Once populated, this field is immutable.
  //
  // If the certificate signing request is denied, a condition of type "Denied" is added and this field remains empty.
  // If the signer cannot issue the certificate, a condition of type "Failed" is added and this field remains empty.
  //
  // Validation requirements:

  // See documentation for the "matchPolicy" field in the webhook configuration type.
  // +optional
  optional string requestSubResource = 15;

  // Name is the name of the object as presented in the request.  On a CREATE operation, the client may omit name and
  // rely on the server to generate the name.  If that is the case, this field will contain an empty string.
  // +optional
  optional string name = 5;

  // reportingController is the name of the controller that emitted this Event, e.g. `kubernetes.io/kubelet`.
  // This field cannot be empty for new Events.
  // +optional
  optional string reportingController = 4;

  // reportingInstance is the ID of the controller instance, e.g. `kubelet-xyzf`.
  // This field cannot be empty for new Events and it can have at most 128 characters.
  // +optional
  optional string reportingInstance = 5;

// to deal with the API objects from a plug-in. Unknown objects still have functioning
// TypeMeta features-- kind, version, etc.
// TODO: Make this object have easy access to field based accessors and settors for
// metadata and field mutatation.
//
// +k8s:deepcopy-gen=true
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
// +protobuf=true
// +k8s:openapi-gen=true
message Unknown {

  // level may borrow at any one time.
  // This field holds the ratio of that limit to the level's nominal
  // concurrency limit. When this field is non-nil, it must hold a
  // non-negative integer and the limit is calculated as follows.
  //
  // BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )
  //
  // The value of this field can be more than 100, implying that this

  // level may borrow at any one time.
  // This field holds the ratio of that limit to the level's nominal
  // concurrency limit. When this field is non-nil, it must hold a
  // non-negative integer and the limit is calculated as follows.
  //
  // BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )
  //
  // The value of this field can be more than 100, implying that this

  // Additional policies may be added in the future.
  // Clients making eviction decisions should disallow eviction of unhealthy pods
  // if they encounter an unrecognized policy in this field.
  //
  // This field is beta-level. The eviction API uses this field when
  // the feature gate PDBUnhealthyPodEvictionPolicy is enabled (enabled by default).
  // +optional
  optional string unhealthyPodEvictionPolicy = 4;
}

  // It is machine-readable.
  // This field cannot be empty for new Events.
  optional string type = 11;

  // deprecatedSource is the deprecated field assuring backward compatibility with core.v1 Event type.
  // +optional
  optional k8s.io.api.core.v1.EventSource deprecatedSource = 12;

  // deprecatedFirstTimestamp is the deprecated field assuring backward compatibility with core.v1 Event type.
  // +optional