gc

type Applier interface {
	ChildClusterName(parent interface{}) (string, error)
	MakeChild(parent interface{}, expectedChild interface{}) error
	MutateChild(parent interface{}, child interface{}, expectedChild interface{}) (needUpdate bool, err error)
	MutateParent(parent interface{}, childFound bool, child interface{}) (needUpdate bool, needStatusUpdate bool, err error)
}

type Options struct {
	ParentPrototype               runtime.Object
	ChildPrototype                runtime.Object
	ParentWatchOptions            controller.WatchOptions
	ChildNamespace                string // optional, can optimize List operations vs. it only be set in MakeChild
	Applier                       Applier
	CopyLabels                    bool
	MakeSelector                  func(parent interface{}) labels.Set // optional
	MakeExpectedChildWhenFound    bool
	GetImpersonatorForChildWriter func(clusterName string) string
}