new_contents: import auditor
  from libs.event_manager import event_types
  from libs.event_manager.event import Event
  
  
  class NotebookStartedEvent(Event):
      type = event_types.NOTEBOOK_STARTED
  
  
  class NotebookSoppedEvent(Event):
      type = event_types.NOTEBOOK_STOPPED
  
  
  auditor.register(NotebookStartedEvent)
  auditor.register(NotebookSoppedEvent)
  
subject: Add auditor notebook's events