// More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Data is the serialized representation of the state.
	Data runtime.RawExtension `json:"data,omitempty" protobuf:"bytes,2,opt,name=data"`

	// Revision indicates the revision of the state represented by Data.

}

// bgCommand returns a go test Cmd and a post-Run flush function. The result
// will write its output to stdout and stderr. If stdout==stderr, bgCommand
// ensures Writes are serialized. The caller should call flush() after Cmd exits.
func (opts *goTest) bgCommand(t *tester, stdout, stderr io.Writer) (cmd *exec.Cmd, flush func()) {
	build, run, pkgs, testFlags, setupCmd := opts.buildArgs(t)

// [Add], [Sub], [Equal] and [Compare]. In some cases, you may need to strip
// the monotonic clock to get accurate results.
//
// Because the monotonic clock reading has no meaning outside
// the current process, the serialized forms generated by t.GobEncode,
// t.MarshalBinary, t.MarshalJSON, and t.MarshalText omit the monotonic
// clock reading, and t.Format provides no format for it. Similarly, the

	if err != nil {
		return nil, err
	}

	return json.Marshal(patchMap)
}

// CreateTwoWayMergeMapPatch creates a patch from an original and modified JSON objects,
// encoded JSONMap.
// The serialized version of the map can then be passed to StrategicMergeMapPatch.
func CreateTwoWayMergeMapPatch(original, modified JSONMap, dataStruct interface{}, fns ...mergepatch.PreconditionFunc) (JSONMap, error) {

	// (entry value is clusterEvent) together with in-flight pods (entry
	// value is *v1.Pod). Entries get added at the end while the mutex is
	// locked, so they get serialized.
	//
	// The pod entries are added in Pop and used to track which events
	// occurred after the pod scheduling attempt for that pod started.
	// They get removed when the scheduling attempt is done, at which

			return input, nil, nil
		}, input)
	if err != nil {
		t.Fatalf("Update failed: %v", err)
	}
	if out.ResourceVersion == initial.ResourceVersion {
		t.Errorf("guaranteed update should have updated the serialized data, got %#v", out)
	}

	lastVersion := out.ResourceVersion

	// this update should not write to etcd because the input matches the stored data
	input = out
	out = &example.Pod{}