code: def empty(self, duration):
          '''Create an empty jams.Annotation for this task.
  
          This method should be overridden by derived classes.
  
          Parameters
          ----------
          duration : int >= 0
              Duration of the annotation
          '''
          return jams.Annotation(namespace=self.namespace, time=0, duration=0f empty(self, duration):
          '''Create an empty jams.Annotation for this task.
  
          This method should be overridden by derived classes.
  
          Parameters
          ----------
          duration : int >= 0
              Duration of the annotation
          '''
          return jams.Annotation(namespace=self.namespace, time=0, duration=0)
docs: Create an empty jams.Annotation for this task.
  
          This method should be overridden by derived classes.
  
          Parameters
          ----------
          duration : int >= 0
              Duration of the annotation