// Required.
  optional string policyName = 1;

  // ParamRef specifies the parameter resource used to configure the admission control policy.
  // It should point to a resource of the type specified in ParamKind of the bound ValidatingAdmissionPolicy.
  // If the policy specifies a ParamKind and the resource referred to by ParamRef does not exist, this binding is considered mis-configured and the FailurePolicy of the ValidatingAdmissionPolicy applied.