// For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1,
  // but "rules" only included `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]`,
  // a request to apps/v1beta1 or extensions/v1beta1 would not be sent to the ValidatingAdmissionPolicy.
  //
  // - Equivalent: match a request if modifies a resource listed in rules, even via another API group or version.

  // If this is specified and differs from the value in "kind", an equivalent match and conversion was performed.
  //
  // For example, if deployments can be modified via apps/v1 and apps/v1beta1, and a webhook registered a rule of
  // `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]` and `matchPolicy: Equivalent`,

  // spec contains the certificate request, and is immutable after creation.
  // Only the request, signerName, expirationSeconds, and usages fields can be set on creation.
  // Other fields are derived by Kubernetes and cannot be modified by users.
  optional CertificateSigningRequestSpec spec = 2;

  // status contains information about whether the request is approved or denied,

  //
  // The server guarantees that the objects returned when using continue will be identical to issuing
  // a single list call without a limit - that is, no objects created, modified, or deleted after the
  // first request is issued will be included in any subsequent continued requests. This is sometimes
  // referred to as a consistent snapshot, and ensures that a client that is using limit to receive

  optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;

  // Immutable, if set to true, ensures that data stored in the ConfigMap cannot
  // be updated (only object metadata can be modified).
  // If not set to true, the field can be modified at any time.
  // Defaulted to nil.
  // +optional
  optional bool immutable = 4;

  // Data contains the configuration data.

  // If this is specified and differs from the value in "kind", an equivalent match and conversion was performed.
  //
  // For example, if deployments can be modified via apps/v1 and apps/v1beta1, and a webhook registered a rule of
  // `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]` and `matchPolicy: Equivalent`,

  // spec contains the certificate request, and is immutable after creation.
  // Only the request, signerName, expirationSeconds, and usages fields can be set on creation.
  // Other fields are derived by Kubernetes and cannot be modified by users.
  optional CertificateSigningRequestSpec spec = 2;

  // Derived information about the request.
  // +optional
  optional CertificateSigningRequestStatus status = 3;
}

  // For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1,
  // but "rules" only included `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]`,
  // a request to apps/v1beta1 or extensions/v1beta1 would not be sent to the webhook.
  //
  // - Equivalent: match a request if modifies a resource listed in rules, even via another API group or version.

  // For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1,
  // but "rules" only included `apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]`,
  // a request to apps/v1beta1 or extensions/v1beta1 would not be sent to the webhook.
  //
  // - Equivalent: match a request if modifies a resource listed in rules, even via another API group or version.