kubernetes/staging/src/k8s.io/kubectl/pkg/cmd/diff/prune.go

type tracker …

func newTracker() *tracker { … }

type pruner …

func newPruner(dc dynamic.Interface, m meta.RESTMapper, r []prune.Resource, selector string) *pruner { … }

func (p *pruner) pruneAll(tracker *tracker, namespaceSpecified bool) ([]runtime.Object, error) { … }

func (p *pruner) prune(tracker *tracker, namespace string, mapping *meta.RESTMapping) ([]runtime.Object, error) { … }

// MarkVisited marks visited namespaces and uids
func (t *tracker) MarkVisited(info *resource.Info) { … }