NewRegistry returns a new Registry interface for the given Storage.

NewStorage returns a new REST.

Services is the default logic that applies when creating and updating Service objects.

REST adapts a service registry into apiserver's RESTStorage model.

TODO: Move to a general location (as other components may need allocation in future; it's not service specific) RangeRegistry is a registry that can retrieve or persist a RangeAllocation object.

Registry is an interface for things that know how to store services.