code: def register(
          self, bundle, classes, properties, svc_instance, factory, prototype
      ):
          
          with self.__svc_lock:
              # Prepare properties
              service_id = self.__next_service_id
              self.__next_service_id += 1
              properties[OBJECTCLASS] = classes
              properties[SERVICE_ID] = service_id
              properties[SERVICE_BUNDLEID] = bundle.get_bundle_id()
  
              # Compute service scope
              if prototype:
                  properties[SERVICE_SCOPE] = SCOPE_PROTOTYPE
              elif factory:
                  properties[SERVICE_SCOPE] = SCOPE_BUNDLE
              else:
                  properties[SERVICE_SCOPE] = SCOPE_SINGLETON
  
              # Force to have a valid service ranking
              try:
                  properties[SERVICE_RANKING] = int(properties[SERVICE_RANKING])
              except (KeyError, ValueError, TypeError):
                  properties[SERVICE_RANKING] = 0
  
              # Make the service reference
              svc_ref = ServiceReference(bundle, properties)
  
              # Make the service registration
              svc_registration = ServiceRegistration(
                  self.__framework, svc_ref, properties, self.__sort_registry
              )
  
              # Store service information
              if prototype or factory:
                  self.__svc_factories[svc_ref] = (svc_instance, svc_registration)
  
              # Also store factories, as they must appear like any other service
              self.__svc_registry[svc_ref] = svc_instance
  
              for spec in classes:
                  spec_refs = self.__svc_specs.setdefault(spec, [])
                  bisect.insort_left(spec_refs, svc_ref)
  
              # Reverse map, to ease bundle/service association
              bundle_services = self.__bundle_svc.setdefault(bundle, set())
              bundle_services.add(svc_ref)
              return svc_registration
docs: Registers a service.
  
          :param bundle: The bundle that registers the service
          :param classes: The classes implemented by the service
          :param properties: The properties associated to the service
          :param svc_instance: The instance of the service
          :param factory: If True, the given service is a service factory
          :param prototype: If True, the given service is a prototype service
                            factory (the factory argument is considered True)
          :return: The ServiceRegistration object