def associate( self, project):
      "called when an extra is first associated with a project."

    def unassociate( self, project):
      "called when an extra is removed from a project."

    def initialSync( self, project):
      """ Does whatever needs doing for an initial sync of the project.
          An extra's configuration should add this event to the queue when
          it's ready.  """

    def pullProject( self, project ):
      """ Should cause a full pull syncronization of this extra from whatever external source
          there is.  This will be called on a scheduled basis for all active projects.  The project
          parameter be an apps.projects.models.Project object.    """

    def storyUpdated( self, project, story ):
      "Called when a story is updated in a project that this extra is associated with."

    def storyDeleted( self, project, external_id):
      """Called when a story is deleted in a project that this extra is associated with.
         Note: the ScrumDo story has already been deleted by the time this method is called. """

    def storyCreated( self, project, story):
      "Called when a story is created in a project that this extra is associated with."

    def storyStatusChange( self, project, story):
      "Called when a story's status has changed in a project that this extra is associated with."