> DS guarantees that activate is called before the service is registered and
> thus available to others.
This is not quite correct (although it is correct for immediate components).
The service is registered after it becomes satisfied (all of its mandatory
service and configuration
Your understanding is correct with respect to the _service_. DS guarantees that
activate is called before the service is registered and thus available to
others. The service is unregistered before you deactivate is called. Nulling
fields is generally unnecessary unless you want to ensure an
