func.return
  }
  func.func @empty_func() {
    func.return
  }
}

// -----

// Tests `tf_device.cluster_func` with missing `topology` attribute.

	if !alphaOptions.Has(option) && !betaOptions.Has(option) && !stableOptions.Has(option) {
		return fmt.Errorf("unknown Topology Manager Policy option: %q", option)
	}

	if alphaOptions.Has(option) && !utilfeature.DefaultFeatureGate.Enabled(kubefeatures.TopologyManagerPolicyAlphaOptions) {
		return fmt.Errorf("Topology Manager Policy Alpha-level Options not enabled, but option %q provided", option)
	}

	// DeprecatedAnnotationTopologyAwareHints can be used to enable or disable
	// Topology Aware Hints for a Service. This may be set to "Auto" or
	// "Disabled". Any other value is treated as "Disabled". This annotation has
	// been deprecated in favor of the "service.kubernetes.io/topology-mode"
	// annotation.
	DeprecatedAnnotationTopologyAwareHints = "service.kubernetes.io/topology-aware-hints"

  %0 = "tf_device.cluster_func"(%arg0) {_producer_name = "UNKNOWN", func = @_func, input_sharding_configuration = [""], num_cores_per_replica = 1 : i64, device_assignment = [], topology = "", output_sharding_configuration = [""], step_marker_location = "STEP_MARK_AT_ENTRY", use_spmd_for_xla_partitioning = false, use_tpu = true} : (tensor<1x3xf32>) -> (tensor<1x3xf32>)
  return %0 : tensor<1x3xf32>
}

  // endpoint.
  // +optional
  optional k8s.io.api.core.v1.ObjectReference targetRef = 4;

  // topology contains arbitrary topology information associated with the
  // endpoint. These key/value pairs must conform with the label format.
  // https://kubernetes.io/docs/concepts/overview/working-with-objects/labels
  // Topology may include a maximum of 16 key/value pairs. This includes, but
  // is not limited to the following well known keys:

// It is to remove dependency on k8s.io/api/core/v1
const (
	LabelHostname = "kubernetes.io/hostname"

	LabelTopologyZone    = "topology.kubernetes.io/zone"
	LabelTopologySubzone = "topology.istio.io/subzone"
	LabelTopologyRegion  = "topology.kubernetes.io/region"
)

// AugmentLabels adds additional labels to the those provided.

	"targetRef":  "targetRef is a reference to a Kubernetes object that represents this endpoint.",

	LabelTopologyZone   = "topology.kubernetes.io/zone"
	LabelTopologyRegion = "topology.kubernetes.io/region"

	// These label have been deprecated since 1.17, but will be supported for
	// the foreseeable future, to accommodate things like long-lived PVs that
	// use them.  New users should prefer the "topology.kubernetes.io/*"
	// equivalents.

    // CHECK: %compilation_status, %program = "tf._TPUCompileMlir"()
    "tf_device.cluster_func"() {_xla_compile_device_type = "TPU", _replication_info = "cluster0", func = @empty_func, num_cores_per_replica = 1, step_marker_location = "", topology = "", device_assignment = [], input_sharding_configuration = [], output_sharding_configuration = [], use_spmd_for_xla_partitioning = false} : () -> ()
    func.return
  }
  func.func @empty_func() {
    func.return
  }

				if rawMgr.policy.Name() == string(PolicyNone) {
					if rawMgr.topology != nil {
						t.Errorf("Expected topology to be nil for 'none' policy. Have: %q", rawMgr.topology)
					}
				}
				if rawMgr.policy.Name() != string(PolicyNone) {
					if rawMgr.topology == nil {
						t.Errorf("Expected topology to be non-nil for policy '%v'. Have: %q", rawMgr.policy.Name(), rawMgr.topology)
					}
				}
			}
		})

	}
}