docs: def mp_worker(self):
          """
          Process one task after another by calling the handler (`copy_file` or `copy_link`) method of the super class.
          """
          while not self.task_queue.empty():
              task_kwargs = self.task_queue.get()
              handler_type = task_kwargs.pop('handler_type')
  
              if handler_type == 'link':
                  super(Command, self).link_file(**task_kwargs)
              else:
                  super(Command, self).copy_file(**task_kwargs)
  
              self.task_queue.task_done()