}

	// Agent A applies initial configuration
	if err := f.Apply(newObj.DeepCopyObject(), "fieldmanager_z", false); err != nil {
		t.Fatalf("failed to apply object: %v", err)
	}

	// Agent B applies additive configuration
	if err := f.Apply(appliedObj, "fieldmanager_b", false); err != nil {
		t.Fatalf("failed to apply object %v", err)
	}

// FieldManager updates the managed fields and merges applied
// configurations.
type FieldManager struct {
	fieldManager Manager
	subresource  string
}

// NewFieldManager creates a new FieldManager that decodes, manages, then re-encodes managedFields
// on update and apply requests.
func NewFieldManager(f Manager, subresource string) *FieldManager {

	"k8s.io/apimachinery/pkg/util/managedfields/internal"
	"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
)

// FieldManager updates the managed fields and merges applied
// configurations.
type FieldManager = internal.FieldManager

// NewDefaultFieldManager creates a new FieldManager that merges apply requests
// and update managed fields for other types of requests.

}

// NewProbabilisticSkipNonAppliedManager creates a new wrapped FieldManager that starts tracking managers after the first apply,
// or starts tracking on create with p probability.
func NewProbabilisticSkipNonAppliedManager(fieldManager Manager, objectCreater runtime.ObjectCreater, p float32) Manager {
	return &skipNonAppliedManager{
		fieldManager:           fieldManager,

// into applyConfiguration. If no managed fields are found for the given fieldManager,
// no error is returned, but applyConfiguration is left unpopulated. It is possible
// that no managed fields were found for the fieldManager because other field managers
// have taken ownership of all the fields previously owned by the fieldManager. It is
// also possible the fieldManager never owned fields.

)

type versionCheckManager struct {
	fieldManager Manager
	gvk          schema.GroupVersionKind
}

var _ Manager = &versionCheckManager{}

// NewVersionCheckManager creates a manager that makes sure that the
// applied object is in the proper version.
func NewVersionCheckManager(fieldManager Manager, gvk schema.GroupVersionKind) Manager {
	return &versionCheckManager{fieldManager: fieldManager, gvk: gvk}
}

			),
		},
		{
			fieldManager: "kubectl",
			original: []byte(`
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-deployment
spec:
  replicas: 3
`),
			applied: []byte(`
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-deployment
spec:
  replicas: 100 # update replicas
`),
		},
		{
			fieldManager: "kubectl",
			lastApplied: []byte(`

)

type lastAppliedUpdater struct {
	fieldManager Manager
}

var _ Manager = &lastAppliedUpdater{}

// NewLastAppliedUpdater sets the client-side apply annotation up to date with
// server-side apply managed fields
func NewLastAppliedUpdater(fieldManager Manager) Manager {
	return &lastAppliedUpdater{
		fieldManager: fieldManager,
	}
}

// Update implements Manager.

func NewCapManagersManager(fieldManager Manager, maxUpdateManagers int) Manager {
	return &capManagersManager{
		fieldManager:          fieldManager,
		maxUpdateManagers:     maxUpdateManagers,
		oldUpdatesManagerName: "ancient-changes",
	}
}

// Update implements Manager.
func (f *capManagersManager) Update(liveObj, newObj runtime.Object, managed Managed, manager string) (runtime.Object, Managed, error) {

			err = ExtractInto(tc.obj, tc.objType, tc.fieldManager, &out, tc.subresource)
			if err != nil {
				t.Fatalf("Unexpected extract error: %v", err)
			}
			if !equality.Semantic.DeepEqual(out, tc.expectedOut) {
				t.Fatalf("Expected output did not match actual output: %s", cmp.Diff(out, tc.expectedOut))
			}
		})
	}
}