MapToSelf returns the namespace/name key of obj.

MapAndEnqueue provides Fns to map objects to name/namespace keys and enqueue them as messages.

EventHandler accepts a workqueue and returns ResourceEventHandler that enqueue messages to it for add / update / delete events.

ControllerLookup takes a ReconcileKey and returns the matching resource.

ObjToKey returns a string namespace/name key for an object.

Path is list of functions that allow an instance of a resource to be traced back to an owning ancestor.